Modularizes the Maven project

This commit modularizes the maven project into several modules:
 - l2jserver2-common: common sources for both login and gameserver
 - l2jserver2-gameserver: the game server
 - l2jserver2-loginserver: the login server
 - l2jserver2-tools: refactored src/tools/java soure folder

l2jserver2-common/src/main/java/com/l2jserver/model/AbstractModel.java

@@ -0,0 +1,110 @@
+/*
+ * 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;
+
+import com.google.common.base.Preconditions;
+import com.l2jserver.model.id.ID;
+
+/**
+ * Simple model interface implementing {@link ID} related methods
+ * 
+ * @param <T>
+ *            the ID type used to represent this {@link Model}
+ * 
+ * @author <a href="http://www.rogiel.com">Rogiel</a>
+ */
+public abstract class AbstractModel<T extends ID<?>> implements Model<T> {
+	/**
+	 * The object id
+	 */
+	protected T id;
+	/**
+	 * The database object state
+	 */
+	protected transient ObjectDesire desire = ObjectDesire.INSERT;
+
+	@Override
+	public T getID() {
+		return id;
+	}
+
+	@Override
+	public void setID(T ID) {
+		Preconditions.checkState(id == null, "ID is already set");
+		desireInsert();
+		this.id = ID;
+	}
+
+	@Override
+	public ObjectDesire getObjectDesire() {
+		return desire;
+	}
+
+	@Override
+	public void setObjectDesire(ObjectDesire desire) {
+		if (desire == null)
+			desire = ObjectDesire.NONE;
+		this.desire = desire;
+	}
+
+	/**
+	 * Set this object desire to {@link ObjectDesire#UPDATE}. If the desire is
+	 * {@link ObjectDesire#INSERT} or {@link ObjectDesire#DELETE} the desire
+	 * will not be changed.
+	 */
+	@SuppressWarnings("javadoc")
+	protected void desireUpdate() {
+		if (this.desire != ObjectDesire.INSERT
+				&& this.desire != ObjectDesire.DELETE)
+			this.desire = ObjectDesire.UPDATE;
+	}
+
+	/**
+	 * Set this object desire to {@link ObjectDesire#INSERT}. If the desire is
+	 * {@link ObjectDesire#DELETE} the desire will not be changed.
+	 */
+	@SuppressWarnings("javadoc")
+	protected void desireInsert() {
+		if (this.desire != ObjectDesire.DELETE)
+			this.desire = ObjectDesire.INSERT;
+	}
+
+	@Override
+	public int hashCode() {
+		final int prime = 31;
+		int result = 1;
+		result = prime * result + ((id == null) ? 0 : id.hashCode());
+		return result;
+	}
+
+	@Override
+	public boolean equals(Object obj) {
+		if (this == obj)
+			return true;
+		if (obj == null)
+			return false;
+		if (getClass() != obj.getClass())
+			return false;
+		AbstractModel<?> other = (AbstractModel<?>) obj;
+		if (id == null) {
+			if (other.id != null)
+				return false;
+		} else if (!id.equals(other.id))
+			return false;
+		return true;
+	}
+}