Add Javadoc sign type descriptions

api/src/main/java/de/erethon/dungeonsxl/api/sign/Button.java

@@ -21,6 +21,10 @@ import org.bukkit.block.Sign;
 import org.bukkit.entity.Player;
 
 /**
+ * A sign that performs a specific action every time it is triggered.
+ * <p>
+ * For example, a classes sign with the default interact trigger sets your class every time you punch it.
+ *
  * @author Daniel Saukel
  */
 public abstract class Button extends AbstractDSign {

api/src/main/java/de/erethon/dungeonsxl/api/sign/Passive.java

@@ -20,6 +20,8 @@ import org.bukkit.block.Sign;
 import org.bukkit.entity.Player;
 
 /**
+ * A sign that does not do anything on its own. Its function is mostly to mark locations or blocks, like lobby or bed signs.
+ *
  * @author Daniel Saukel
  */
 public abstract class Passive extends AbstractDSign {

api/src/main/java/de/erethon/dungeonsxl/api/sign/Rocker.java

@@ -20,7 +20,10 @@ import org.bukkit.block.Sign;
 import org.bukkit.entity.Player;
 
 /**
- * A {@link Deactivatable} that, if triggered, and already activated, is deactivated.
+ * A sign that has a <i>deactivated</i> and an <i>activated state</i> and can switch between these two.
+ * <p>
+ * For example, if a door sign is activated, the door opens - if it is deactivated, the door closes. The state may be set for the whole game world or for the
+ * player who triggered the sign depending on the context.
  *
  * @author Daniel Saukel
  */

api/src/main/java/de/erethon/dungeonsxl/api/sign/Windup.java

@@ -19,6 +19,9 @@ import de.erethon.dungeonsxl.api.world.GameWorld;
 import org.bukkit.block.Sign;
 
 /**
+ * A sign with an attached task that does actions in a set interval <i>n</i> times, like a mob sign that spawns <i>n</i> mobs. It is similar to a {@link Rocker}
+ * as it expires (=is deactivated).
+ *
  * @author Daniel Saukel
  */
 public abstract class Windup extends Deactivatable {