diff --git a/qubes/vm/templatevm.py b/qubes/vm/templatevm.py
index 611b21cb..ca97dec4 100644
--- a/qubes/vm/templatevm.py
+++ b/qubes/vm/templatevm.py
@@ -1,5 +1,28 @@
 #!/usr/bin/python2 -O
 # vim: fileencoding=utf-8
+#
+# The Qubes OS Project, http://www.qubes-os.org
+#
+# Copyright (C) 2014-2016  Wojtek Porczyk <woju@invisiblethingslab.com>
+# Copyright (C) 2016       Marek Marczykowski <marmarek@invisiblethingslab.com>)
+# Copyright (C) 2016       Bahtiar `kalkin-` Gadimov <bahtiar@gadimov.de>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# 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.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+
+''' This module contains the TemplateVM implementation '''
 
 import warnings
 
@@ -24,6 +47,9 @@ class TemplateVM(QubesVM):
 
     @property
     def appvms(self):
+        ''' Returns a generator containing all domains based on the current
+            TemplateVM.
+        '''
         for vm in self.app.domains:
             if hasattr(vm, 'template') and vm.template is self:
                 yield vm