diff --git a/osx/auto-update/auto-update.h b/osx/auto-update/auto-update.h
index 14caa32..4313641 100644
--- a/osx/auto-update/auto-update.h
+++ b/osx/auto-update/auto-update.h
@@ -1,8 +1,29 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ *         Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
 #ifndef AUTO_UPDATE_H
 #define AUTO_UPDATE_H
 class AutoUpdate
 {
-  public:
-    virtual void checkForUpdates() = 0;
+public:
+  virtual void checkForUpdates() = 0;
 };
 #endif
diff --git a/osx/auto-update/sparkle-auto-update.h b/osx/auto-update/sparkle-auto-update.h
index 9050bff..dc54bb1 100644
--- a/osx/auto-update/sparkle-auto-update.h
+++ b/osx/auto-update/sparkle-auto-update.h
@@ -1,7 +1,30 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ *         Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
 #ifndef SPARKLE_AUTO_UPDATE_H
 #define SPARKLE_AUTO_UPDATE_H
+
 #include "auto-update.h"
 #include <QString>
+
 class SparkleAutoUpdate : public AutoUpdate
 {
 public:
@@ -11,5 +34,6 @@
 private:
   class Private;
   Private *d;
-}
+};
+
 #endif
diff --git a/osx/auto-update/sparkle-auto-update.mm b/osx/auto-update/sparkle-auto-update.mm
index be49b55..5b35a76 100644
--- a/osx/auto-update/sparkle-auto-update.mm
+++ b/osx/auto-update/sparkle-auto-update.mm
@@ -1,4 +1,26 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ *         Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
 #include "sparkle-auto-update.h"
+#import <Foundation/Foundation.h>
 #import <Sparkle/Sparkle.h>
 
 class SparkleAutoUpdate::Private