diff --git a/NCPCommons/src/main/java/fr/neatmonster/nocheatplus/time/monotonic/package-info.java b/NCPCommons/src/main/java/fr/neatmonster/nocheatplus/time/monotonic/package-info.java
index ccc1809d..5de8656c 100644
--- a/NCPCommons/src/main/java/fr/neatmonster/nocheatplus/time/monotonic/package-info.java
+++ b/NCPCommons/src/main/java/fr/neatmonster/nocheatplus/time/monotonic/package-info.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 /**
  * Provides monotonic clocks. [Taken from NC4 Planning/Framework.]
  * @author mc_dev
diff --git a/NCPCommons/src/main/java/fr/neatmonster/nocheatplus/utilities/ds/map/CoordHash.java b/NCPCommons/src/main/java/fr/neatmonster/nocheatplus/utilities/ds/map/CoordHash.java
index 7bae855a..7748975b 100644
--- a/NCPCommons/src/main/java/fr/neatmonster/nocheatplus/utilities/ds/map/CoordHash.java
+++ b/NCPCommons/src/main/java/fr/neatmonster/nocheatplus/utilities/ds/map/CoordHash.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.utilities.ds.map;
 
 public class CoordHash {
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/actions/types/CommandActionWithColor.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/actions/types/CommandActionWithColor.java
index 0289ebdb..7e2d9c33 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/actions/types/CommandActionWithColor.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/actions/types/CommandActionWithColor.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.actions.types;
 
 import fr.neatmonster.nocheatplus.actions.AbstractActionList;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/access/IRemoveSubCheckData.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/access/IRemoveSubCheckData.java
index ead7a9e0..46e2fd8a 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/access/IRemoveSubCheckData.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/access/IRemoveSubCheckData.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.checks.access;
 
 import fr.neatmonster.nocheatplus.checks.CheckType;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/generic/block/AbstractBlockDirectionCheck.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/generic/block/AbstractBlockDirectionCheck.java
index 1307ff52..07184d29 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/generic/block/AbstractBlockDirectionCheck.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/generic/block/AbstractBlockDirectionCheck.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.checks.generic.block;
 
 import org.bukkit.Location;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/moving/velocity/VelocityFlags.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/moving/velocity/VelocityFlags.java
index 543df423..db7fe0d5 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/moving/velocity/VelocityFlags.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/moving/velocity/VelocityFlags.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.checks.moving.velocity;
 
 /**
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/net/FlyingQueueHandle.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/net/FlyingQueueHandle.java
index 679de250..24e26d39 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/net/FlyingQueueHandle.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/net/FlyingQueueHandle.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.checks.net;
 
 import org.bukkit.entity.Player;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/net/FlyingQueueLookBlockChecker.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/net/FlyingQueueLookBlockChecker.java
index 65ff0ed9..4b4018db 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/net/FlyingQueueLookBlockChecker.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/net/FlyingQueueLookBlockChecker.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.checks.net;
 
 import fr.neatmonster.nocheatplus.checks.net.model.DataPacketFlying;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/net/PacketFrequency.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/net/PacketFrequency.java
index 4ca7e31f..18986669 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/net/PacketFrequency.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/net/PacketFrequency.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.checks.net;
 
 import org.bukkit.entity.Player;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/command/admin/log/stream/StreamCommand.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/command/admin/log/stream/StreamCommand.java
index 5274fd07..c01ce9b8 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/command/admin/log/stream/StreamCommand.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/command/admin/log/stream/StreamCommand.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.command.admin.log.stream;
 
 import java.util.logging.Level;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/activation/ActivationUtil.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/activation/ActivationUtil.java
index 9542556c..6eb6728e 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/activation/ActivationUtil.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/activation/ActivationUtil.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.compat.activation;
 
 import fr.neatmonster.nocheatplus.components.registry.activation.Activation;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/AbstractBlockPropertiesPatch.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/AbstractBlockPropertiesPatch.java
index 269e332b..3f8221e7 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/AbstractBlockPropertiesPatch.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/AbstractBlockPropertiesPatch.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.compat.blocks;
 
 import fr.neatmonster.nocheatplus.components.registry.activation.Activation;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/IPatchBlockPropertiesSetup.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/IPatchBlockPropertiesSetup.java
index 665f05cf..88050bed 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/IPatchBlockPropertiesSetup.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/IPatchBlockPropertiesSetup.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.compat.blocks;
 
 import fr.neatmonster.nocheatplus.components.registry.activation.IDescriptiveActivation;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/changetracker/BlockChangeListener.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/changetracker/BlockChangeListener.java
index 5bd74ee6..7dd7c6ee 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/changetracker/BlockChangeListener.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/changetracker/BlockChangeListener.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.compat.blocks.changetracker;
 
 import java.util.ArrayList;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/changetracker/BlockChangeReference.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/changetracker/BlockChangeReference.java
index ecda5441..a46c17d7 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/changetracker/BlockChangeReference.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/changetracker/BlockChangeReference.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.compat.blocks.changetracker;
 
 import fr.neatmonster.nocheatplus.compat.blocks.changetracker.BlockChangeTracker.BlockChangeEntry;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/changetracker/OnGroundReference.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/changetracker/OnGroundReference.java
index 66223580..ed8fabe8 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/changetracker/OnGroundReference.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/changetracker/OnGroundReference.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.compat.blocks.changetracker;
 
 import java.util.LinkedList;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/init/vanilla/BlocksMC1_12.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/init/vanilla/BlocksMC1_12.java
index 1c102fbc..45d157da 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/init/vanilla/BlocksMC1_12.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/init/vanilla/BlocksMC1_12.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.compat.blocks.init.vanilla;
 
 import org.bukkit.Material;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/init/vanilla/special/MultiClientProtocolBlockShapePatch.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/init/vanilla/special/MultiClientProtocolBlockShapePatch.java
index 791e369a..11e8a69d 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/init/vanilla/special/MultiClientProtocolBlockShapePatch.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/compat/blocks/init/vanilla/special/MultiClientProtocolBlockShapePatch.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.compat.blocks.init.vanilla.special;
 
 import java.util.LinkedList;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/data/checktype/CheckTypeTree.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/data/checktype/CheckTypeTree.java
index a997dacc..268c259d 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/data/checktype/CheckTypeTree.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/data/checktype/CheckTypeTree.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.components.data.checktype;
 
 import java.util.ArrayList;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/entity/IEntityAccessVehicle.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/entity/IEntityAccessVehicle.java
index 3788036d..1255fa26 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/entity/IEntityAccessVehicle.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/entity/IEntityAccessVehicle.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.components.entity;
 
 import java.util.List;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/location/IGetBox2D.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/location/IGetBox2D.java
index ba31e1bd..3fad6e74 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/location/IGetBox2D.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/location/IGetBox2D.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.components.location;
 
 /**
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/location/IGetBox3D.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/location/IGetBox3D.java
index cb90a412..ff78f36c 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/location/IGetBox3D.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/location/IGetBox3D.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.components.location;
 
 /**
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/exception/AlreadyRegisteredException.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/exception/AlreadyRegisteredException.java
index 00766021..d00554ea 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/exception/AlreadyRegisteredException.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/exception/AlreadyRegisteredException.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.components.registry.exception;
 
 /**
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/IGetRegistrationOrder.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/IGetRegistrationOrder.java
index 7752d1aa..7216954f 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/IGetRegistrationOrder.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/IGetRegistrationOrder.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.components.registry.order;
 
 /**
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/IRegisterWithOrder.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/IRegisterWithOrder.java
index 8f1c036a..e5207a14 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/IRegisterWithOrder.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/IRegisterWithOrder.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.components.registry.order;
 
 public interface IRegisterWithOrder {
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/RegistrationOrder.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/RegistrationOrder.java
index 70c03f47..00de5dcb 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/RegistrationOrder.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/RegistrationOrder.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.components.registry.order;
 
 import java.lang.annotation.Documented;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/RegistrationOrderStore.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/RegistrationOrderStore.java
index 2831ae9b..666c21d2 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/RegistrationOrderStore.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/order/RegistrationOrderStore.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.components.registry.order;
 
 import java.util.HashMap;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/store/RegisteredItemStore.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/store/RegisteredItemStore.java
index daaf39de..33d51264 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/store/RegisteredItemStore.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/components/registry/store/RegisteredItemStore.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.components.registry.store;
 
 import java.util.ArrayList;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/EventRegistryBukkit.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/EventRegistryBukkit.java
index 12b9a109..35ced735 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/EventRegistryBukkit.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/EventRegistryBukkit.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.event.mini;
 
 import java.lang.reflect.Method;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListener.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListener.java
index b0973a86..d167ca4e 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListener.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListener.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.event.mini;
 
 /**
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListenerNode.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListenerNode.java
index 73be0fdf..0860d445 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListenerNode.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListenerNode.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.event.mini;
 
 import java.util.ArrayList;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListenerRegistry.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListenerRegistry.java
index 14c47c4f..bfc076d7 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListenerRegistry.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListenerRegistry.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.event.mini;
 
 import java.util.ArrayList;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListenerWithOrder.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListenerWithOrder.java
index b698831a..95456e0b 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListenerWithOrder.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MiniListenerWithOrder.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.event.mini;
 
 import fr.neatmonster.nocheatplus.components.registry.order.IGetRegistrationOrder;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MultiListenerRegistry.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MultiListenerRegistry.java
index 0ab4ce22..2442f993 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MultiListenerRegistry.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/event/mini/MultiListenerRegistry.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.event.mini;
 
 import java.lang.reflect.InvocationTargetException;
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/utilities/CheckTypeUtil.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/utilities/CheckTypeUtil.java
index 937d7245..6c3ea5ab 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/utilities/CheckTypeUtil.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/utilities/CheckTypeUtil.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.utilities;
 
 import java.util.Collections;
diff --git a/NCPCore/src/test/java/fr/neatmonster/nocheatplus/test/TestCheckTypeTree.java b/NCPCore/src/test/java/fr/neatmonster/nocheatplus/test/TestCheckTypeTree.java
index b848797f..6e6ae822 100644
--- a/NCPCore/src/test/java/fr/neatmonster/nocheatplus/test/TestCheckTypeTree.java
+++ b/NCPCore/src/test/java/fr/neatmonster/nocheatplus/test/TestCheckTypeTree.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.test;
 
 import static org.junit.Assert.fail;
diff --git a/NCPCore/src/test/java/fr/neatmonster/nocheatplus/test/TestRegistrationOrder.java b/NCPCore/src/test/java/fr/neatmonster/nocheatplus/test/TestRegistrationOrder.java
index ceda2b94..60209356 100644
--- a/NCPCore/src/test/java/fr/neatmonster/nocheatplus/test/TestRegistrationOrder.java
+++ b/NCPCore/src/test/java/fr/neatmonster/nocheatplus/test/TestRegistrationOrder.java
@@ -1,3 +1,17 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.neatmonster.nocheatplus.test;
 
 import static org.junit.Assert.fail;
diff --git a/add_gplv3_header.py b/add_gplv3_header.py
new file mode 100644
index 00000000..882a88dd
--- /dev/null
+++ b/add_gplv3_header.py
@@ -0,0 +1,118 @@
+# ~ coding: UTF-8 ~
+'''
+- Find files that don't start with the GPLv3 header.
+- As a secondary product, count files and size and lines.
+- Add a GPLv3 header to each .java file where it may be missing.
+@license: See #LICENSE below.
+'''
+from cgitb import text
+
+LICENSE = """/*
+ * This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */"""
+
+import sys
+import os
+
+class ResultCollector:
+    
+    def __init__(self, lc_exts = (".java",), ignore_startswith = ()):
+        self.lc_exts = tuple(map(lambda x: x.lower(), lc_exts))
+        self.max_len_inspect = max(map(len, ignore_startswith)) + 50 if ignore_startswith else 0
+        self.ignore_startswith = tuple(map(self.transform_special, ignore_startswith))
+        self.collected_files = []
+        self.not_collected_files = 0
+        self.lines_total = 0
+        self.bytes_total = 0
+    
+    def transform_special(self, s):
+        """
+        Transform string for comparison in a special way.
+        """
+        for remove in ("\r\n", "\n", "\r", " ", "\t"):
+            s = s.replace(remove, "")
+        return s
+    
+    def check_ignore_startswith(self, content):
+        """
+        Return True if the content starts with any of the ignore_startswith parts.
+        """
+        content = self.transform_special(content[:self.max_len_inspect])
+        for ref in self.ignore_startswith:
+            if content.startswith(ref):
+                return True
+        return False
+        
+    def stats_str(self):
+        collected = len(self.collected_files)
+        return "collected=" + repr(collected) + " total_files=" + repr(collected + self.not_collected_files) + " total_lines=" + repr(self.lines_total) + " total_bytes=" + repr(self.bytes_total)
+    806895
+    
+    def collect_filename(self, fp):
+        """
+        Only "collect" if the file doesn't start with 'ignore_startswith'.
+        """
+        f = open(fp, "rb")
+        c = f.read().decode("UTF-8") # Assume UTF-8 sources.
+        f.close()
+        if self.check_ignore_startswith(c):
+            self.not_collected_files += 1
+        else:
+            self.collected_files.append(fp)
+        self.bytes_total += len(c)
+        if c:
+            self.lines_total += 1 + c.count("\n")
+
+    def collect_filenames(self, path):
+        """
+        Recursively collect full paths of files with lower case extension in lc_exts,
+        not starting with ignore_startswith.
+        """
+        items = os.listdir(path)
+        for item in items:
+            fp = os.path.join(path, item)
+            if os.path.islink(fp):
+                continue
+            if os.path.isfile(fp) and os.path.splitext(item)[1].lower() in self.lc_exts:
+                self.collect_filename(fp)
+            elif os.path.isdir(fp):
+                self.collect_filenames(fp)
+
+def main():
+    path = os.path.abspath(os.path.normpath(os.path.split(sys.argv[0])[0]))
+    print("Working on path: " + path)
+    
+    items = os.listdir(path)
+    license = unicode(LICENSE)
+    files_java = ResultCollector(lc_exts = (".java",), ignore_startswith = (license,))
+    for item in items:
+        fp = os.path.join(path, item)
+        if os.path.isdir(fp) and not os.path.islink(path) and item.startswith("NCP") or item == "NoCheatPlus":
+            files_java.collect_filenames(fp)
+            # TODO: Also collect other contained file types (pom.xml, ...).
+    print(".java: " + files_java.stats_str())
+    print("Update license:")
+    for fp in files_java.collected_files:
+        rp = os.path.relpath(fp, path)
+        f = open(fp, "rb")
+        c = f.read().decode("UTF-8")
+        f.close()
+        c = license + "\n" + c
+        f = open(fp, "wb")
+        f.write(c)
+        f.close()
+        print(rp)
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file