--- a/src/core/model/watchdog.cc	Wed Dec 17 12:17:11 2014 -0800
+++ b/src/core/model/watchdog.cc	Thu Dec 18 15:12:35 2014 -0800
@@ -21,6 +21,12 @@
 #include "log.h"
 
 
+/**
+ * \file
+ * \ingroup timer
+ * ns3::Watchdog timer class implementation.
+ */
+
 namespace ns3 {
 
 NS_LOG_COMPONENT_DEFINE ("Watchdog");