Add a copyright header.

diff --git a/examples/org.eclipse.e4.examples.services/src/org/eclipse/e4/examples/services/snippets/adapter/ThingWithId.java b/examples/org.eclipse.e4.examples.services/src/org/eclipse/e4/examples/services/snippets/adapter/ThingWithId.java
index d198efa..c2ec35f 100644
--- a/examples/org.eclipse.e4.examples.services/src/org/eclipse/e4/examples/services/snippets/adapter/ThingWithId.java
+++ b/examples/org.eclipse.e4.examples.services/src/org/eclipse/e4/examples/services/snippets/adapter/ThingWithId.java

@@ -1,3 +1,13 @@
+/*******************************************************************************
+ * Copyright (c) 2010 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
 package org.eclipse.e4.examples.services.snippets.adapter;
 
 public interface ThingWithId {