Several improvements

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

src/main/java/com/l2jserver/model/id/provider/IDProvider.java

@@ -0,0 +1,35 @@
+/*
+ * This file is part of l2jserver <l2jserver.com>.
+ *
+ * l2jserver 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.
+ *
+ * l2jserver 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 l2jserver.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.l2jserver.model.id.provider;
+
+import com.l2jserver.model.id.ID;
+
+/**
+ * The ID factory is used to create instances of IDs. It will automatically make
+ * sure the ID is free before allocating it.
+ * 
+ * @author <a href="http://www.rogiel.com">Rogiel</a>
+ */
+public interface IDProvider<I, T extends ID<?>> {
+	/**
+	 * Creates the ID object for an <b>EXISTING</b> ID.
+	 * 
+	 * @param id
+	 * @return
+	 */
+	T createID(I id);
+}