docs: Updating copyright notices in files
diff --git a/model/ndn-face.hpp b/model/ndn-face.hpp
index e1b35e0..c532501 100644
--- a/model/ndn-face.hpp
+++ b/model/ndn-face.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2011-2014  Regents of the University of California.
+ * Copyright (c) 2011-2015  Regents of the University of California.
  *
  * This file is part of ndnSIM. See AUTHORS for complete list of ndnSIM authors and
  * contributors.