copyright header added to LibraryExtensions

plugins/org.yakindu.sct.generator.core/src/org/yakindu/sct/generator/core/extensions/LibraryExtensions.java

@@ -1,3 +1,13 @@
+/**
+ * Copyright (c) 2011 committers of YAKINDU 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:
+ *     committers of YAKINDU - initial API and implementation
+ */
 package org.yakindu.sct.generator.core.extensions;
 
 import static com.google.common.collect.Iterables.transform;