--- a/sat_pubsub/mam.py	Mon Dec 21 13:44:21 2015 +0100
+++ b/sat_pubsub/mam.py	Sun Jan 03 18:28:34 2016 +0100
@@ -1,6 +1,21 @@
 #!/usr/bin/python
 #-*- coding: utf-8 -*-
 
+# Copyright (c) 2015-2016 Adrien Cossa
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 """
 XMPP Message Archive Management protocol.
 
@@ -8,6 +23,7 @@
 U{XEP-0313<http://xmpp.org/extensions/xep-0313.html>}.
 """
 
+
 from zope.interface import implements
 
 from twisted.words.xish import domish