Written javadoc for many classes

Signed-off-by: Rogiel <rogiel@rogiel.com>

src/main/java/com/l2jserver/model/id/object/PetID.java

@@ -2,8 +2,14 @@ package com.l2jserver.model.id.object;
 
 import com.google.inject.Inject;
 import com.l2jserver.db.dao.PetDAO;
+import com.l2jserver.model.id.ObjectID;
 import com.l2jserver.model.world.Pet;
 
+/**
+ * An {@link ObjectID} instance representing an {@link Pet} object
+ * 
+ * @author <a href="http://www.rogiel.com">Rogiel</a>
+ */
 public final class PetID extends ActorID<Pet> {
 	/**
 	 * Data Access Object (DAO) for pets