Removed "core" project dependency

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

src/main/java/com/l2jserver/service/database/DataAccessObject.java

@@ -0,0 +1,17 @@
+package com.l2jserver.service.database;
+
+/**
+ * The DAO interface
+ * <p>
+ * TODO make DAO an {@link Iterable}. So if we want to select all objects we can
+ * do like this: <code><pre>
+ * for(final Object o : daoInstance) {
+ * 	...
+ * }
+ * </pre></code>
+ * 
+ * @author <a href="http://www.rogiel.com">Rogiel</a>
+ */
+public interface DataAccessObject<T> {
+
+}