Fixes JavaDoc warnings. (#164)

@inheritDoc cannot be used on Constructors.

Fixed some other warnings.

src/main/java/world/bentobox/challenges/handlers/ChallengeDataRequestHandler.java

@@ -29,10 +29,10 @@ public class ChallengeDataRequestHandler extends AddonRequestHandler
     }
 
 
-	/**
+    /* (non-Javadoc)
      * @param metaData Required meta data.
      * @return Map that returns information about challenges
-	 * @see AddonRequestHandler#handle(Map<String, Object>)
+     * @see world.bentobox.bentobox.api.addons.request.AddonRequestHandler#handle(java.util.Map)
      */
     @Override
     public Object handle(Map<String, Object> metaData)

src/main/java/world/bentobox/challenges/handlers/ChallengeListRequestHandler.java

@@ -26,10 +26,10 @@ public class ChallengeListRequestHandler extends AddonRequestHandler
     }
 
 
-	/**
+    /* (non-Javadoc)
+     * @see world.bentobox.bentobox.api.addons.request.AddonRequestHandler#handle(java.util.Map)
      * @param metaData Required meta data.
      * @return Set of strings that contains completed challenges.
-	 * @see AddonRequestHandler#handle(Map <String, Object>)
      */
     @Override
     public Object handle(Map<String, Object> metaData)

src/main/java/world/bentobox/challenges/handlers/CompletedChallengesRequestHandler.java

@@ -29,10 +29,10 @@ public class CompletedChallengesRequestHandler extends AddonRequestHandler
     }
 
 
-	/**
+    /* (non-Javadoc)
+     * @see world.bentobox.bentobox.api.addons.request.AddonRequestHandler#handle(java.util.Map)
      * @param metaData Required meta data.
      * @return Set of strings that contains completed challenges.
-	 * @see AddonRequestHandler#handle(Map<String, Object>)
      */
     @Override
     public Object handle(Map<String, Object> metaData)

src/main/java/world/bentobox/challenges/handlers/LevelDataRequestHandler.java

@@ -27,10 +27,10 @@ public class LevelDataRequestHandler extends AddonRequestHandler
     }
 
 
-	/**
+    /* (non-Javadoc)
+     * @see world.bentobox.bentobox.api.addons.request.AddonRequestHandler#handle(java.util.Map)
      * @param metaData Required meta data.
      * @return Map that returns information about level
-	 * @see AddonRequestHandler#handle(Map <String, Object>)
      */
     @Override
     public Object handle(Map<String, Object> metaData)

src/main/java/world/bentobox/challenges/handlers/LevelListRequestHandler.java

@@ -27,10 +27,10 @@ public class LevelListRequestHandler extends AddonRequestHandler
     }
 
 
-	/**
+    /* (non-Javadoc)
+     * @see world.bentobox.bentobox.api.addons.request.AddonRequestHandler#handle(java.util.Map)
      * @param metaData Required meta data.
      * @return List of strings that contains levels in given world
-	 * @see AddonRequestHandler#handle(Map <String, Object>)
      */
     @Override
     public Object handle(Map<String, Object> metaData)

src/main/java/world/bentobox/challenges/panel/CommonGUI.java

@@ -1,6 +1,11 @@
 package world.bentobox.challenges.panel;
 
 
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
 import org.bukkit.Material;
 import org.bukkit.World;
 import org.bukkit.entity.EntityType;
@@ -16,10 +21,6 @@ import org.bukkit.inventory.meta.SkullMeta;
 import org.bukkit.inventory.meta.SpawnEggMeta;
 import org.bukkit.inventory.meta.TropicalFishBucketMeta;
 import org.bukkit.potion.PotionData;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-import java.util.Map;
 
 import world.bentobox.bentobox.api.panels.PanelItem;
 import world.bentobox.bentobox.api.panels.builders.PanelItemBuilder;
@@ -213,6 +214,7 @@ public abstract class CommonGUI
      * @param button Button that must be returned.
      * @return PanelItem with requested functionality.
      */
+    @SuppressWarnings("deprecation")
     protected PanelItem getButton(CommonButtons button)
     {
         ItemStack icon;

src/main/java/world/bentobox/challenges/panel/GameModesGUI.java

@@ -23,9 +23,14 @@ import world.bentobox.challenges.utils.GuiUtils;
 public class GameModesGUI extends CommonGUI
 {
     /**
-	 * {@inheritDoc}
      * @param adminMode - boolean that indicate if Gui is in admin mode.
      * @param gameModeAddons - List with GameModes where Challenges addon is integrated.
+     * @param addon Addon where panel operates.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
+
      */
     public GameModesGUI(ChallengesAddon addon,
             World world,

src/main/java/world/bentobox/challenges/panel/admin/AdminGUI.java

@@ -5,15 +5,11 @@ import org.bukkit.Material;
 import org.bukkit.World;
 import org.bukkit.inventory.ItemStack;
 
-import java.util.Optional;
-
 import net.wesjd.anvilgui.AnvilGUI;
-import world.bentobox.bentobox.api.addons.GameModeAddon;
 import world.bentobox.bentobox.api.panels.PanelItem;
 import world.bentobox.bentobox.api.panels.builders.PanelBuilder;
 import world.bentobox.bentobox.api.panels.builders.PanelItemBuilder;
 import world.bentobox.bentobox.api.user.User;
-import world.bentobox.bentobox.util.Util;
 import world.bentobox.challenges.ChallengesAddon;
 import world.bentobox.challenges.panel.CommonGUI;
 import world.bentobox.challenges.panel.util.ConfirmationGUI;
@@ -71,9 +67,12 @@ public class AdminGUI extends CommonGUI
     // Section: Constructor
     // ---------------------------------------------------------------------
 
-
     /**
-	 * {@inheritDoc}
+     * @param addon Addon where panel operates.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
      */
     public AdminGUI(ChallengesAddon addon,
             World world,
@@ -93,6 +92,7 @@ public class AdminGUI extends CommonGUI
     /**
      * {@inheritDoc}
      */
+    @Override
     public void build()
     {
         PanelBuilder panelBuilder = new PanelBuilder().user(this.user).name(

src/main/java/world/bentobox/challenges/panel/admin/EditChallengeGUI.java

@@ -37,8 +37,12 @@ public class EditChallengeGUI extends CommonGUI
 
 
     /**
-	 * {@inheritDoc}
+     * @param addon Addon where panel operates.
-	 * @param challenge challenge that needs editing.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
+     * @param challenge - challenge that needs editing
      */
     public EditChallengeGUI(ChallengesAddon addon,
             World world,
@@ -52,7 +56,11 @@ public class EditChallengeGUI extends CommonGUI
 
 
     /**
-	 * {@inheritDoc}
+     * @param addon Addon where panel operates.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
      * @param challenge challenge that needs editing.
      */
     public EditChallengeGUI(ChallengesAddon addon,

src/main/java/world/bentobox/challenges/panel/admin/EditLevelGUI.java

@@ -1,13 +1,17 @@
 package world.bentobox.challenges.panel.admin;
 
 
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
 import org.bukkit.ChatColor;
 import org.bukkit.Material;
 import org.bukkit.World;
-import org.bukkit.enchantments.Enchantment;
 import org.bukkit.inventory.ItemStack;
-import java.util.*;
-import java.util.stream.Collectors;
 
 import net.wesjd.anvilgui.AnvilGUI;
 import world.bentobox.bentobox.api.panels.PanelItem;
@@ -38,7 +42,11 @@ public class EditLevelGUI extends CommonGUI
 
 
     /**
-	 * {@inheritDoc}
+     * @param addon Addon where panel operates.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
      * @param challengeLevel ChallengeLevel that must be edited.
      */
     public EditLevelGUI(ChallengesAddon addon,
@@ -53,7 +61,11 @@ public class EditLevelGUI extends CommonGUI
 
 
     /**
-	 * {@inheritDoc}
+     * @param addon Addon where panel operates.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
      * @param challengeLevel ChallengeLevel that must be edited.
      */
     public EditLevelGUI(ChallengesAddon addon,

src/main/java/world/bentobox/challenges/panel/admin/EditSettingsGUI.java

@@ -1,13 +1,13 @@
 package world.bentobox.challenges.panel.admin;
 
 
+import java.util.ArrayList;
+import java.util.List;
+
 import org.bukkit.Material;
 import org.bukkit.World;
 import org.bukkit.inventory.ItemStack;
 
-import java.util.ArrayList;
-import java.util.List;
-
 import net.wesjd.anvilgui.AnvilGUI;
 import world.bentobox.bentobox.api.panels.PanelItem;
 import world.bentobox.bentobox.api.panels.builders.PanelBuilder;
@@ -32,7 +32,11 @@ public class EditSettingsGUI extends CommonGUI
 
 
     /**
-	 * {@inheritDoc}
+     * @param addon Addon where panel operates.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
      */
     public EditSettingsGUI(ChallengesAddon addon,
             World world,
@@ -45,7 +49,11 @@ public class EditSettingsGUI extends CommonGUI
 
 
     /**
-	 * {@inheritDoc}
+     * @param addon Addon where panel operates.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
      */
     public EditSettingsGUI(ChallengesAddon addon,
             World world,
@@ -116,6 +124,7 @@ public class EditSettingsGUI extends CommonGUI
     }
 
 
+    @SuppressWarnings("deprecation")
     private PanelItem getSettingsButton(Button button)
     {
         ItemStack icon;

src/main/java/world/bentobox/challenges/panel/admin/ListChallengesGUI.java

@@ -29,7 +29,11 @@ public class ListChallengesGUI extends CommonGUI
 
 
     /**
-	 * {@inheritDoc}
+     * @param addon Addon where panel operates.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
      * @param mode - mode that indicate what should do icon clicking.
      */
     public ListChallengesGUI(ChallengesAddon addon,
@@ -44,7 +48,11 @@ public class ListChallengesGUI extends CommonGUI
 
 
     /**
-	 * {@inheritDoc}
+     * @param addon Addon where panel operates.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
      * @param mode - mode that indicate what should do icon clicking.
      */
     public ListChallengesGUI(ChallengesAddon addon,

src/main/java/world/bentobox/challenges/panel/admin/ListLevelsGUI.java

@@ -29,7 +29,11 @@ public class ListLevelsGUI extends CommonGUI
 
 
     /**
-	 * {@inheritDoc}
+     * @param addon Addon where panel operates.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
      * @param mode - mode that indicate what should do icon clicking.
      */
     public ListLevelsGUI(ChallengesAddon addon,
@@ -44,7 +48,11 @@ public class ListLevelsGUI extends CommonGUI
 
 
     /**
-	 * {@inheritDoc}
+     * @param addon Addon where panel operates.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
      * @param mode - mode that indicate what should do icon clicking.
      */
     public ListLevelsGUI(ChallengesAddon addon,

src/main/java/world/bentobox/challenges/panel/admin/ListUsersGUI.java

@@ -76,7 +76,11 @@ public class ListUsersGUI extends CommonGUI
 
 
     /**
-	 * {@inheritDoc}
+     * @param addon Addon where panel operates.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
      * @param operationMode Indicate what should happen on player icon click.
      */
     public ListUsersGUI(ChallengesAddon addon,
@@ -91,7 +95,11 @@ public class ListUsersGUI extends CommonGUI
 
 
     /**
-	 * {@inheritDoc}
+     * @param addon Addon where panel operates.
+     * @param world World from which panel was created.
+     * @param user User who created panel.
+     * @param topLabel Command top label which creates panel (f.e. island or ai)
+     * @param permissionPrefix Command permission prefix (f.e. bskyblock.)
      * @param operationMode Indicate what should happen on player icon click.
      */
     public ListUsersGUI(ChallengesAddon addon,