diff --git a/kippo/core/output.py b/kippo/core/output.py
index 89d1fc4..ecde498 100644
--- a/kippo/core/output.py
+++ b/kippo/core/output.py
@@ -1,11 +1,35 @@
-# Copyright (c) 2009-2014 Upi Tamminen <desaster@gmail.com>
-# See the COPYRIGHT file for more information
+# Copyright (c) 2015 Michel Oosterhof <michel@oosterhof.net>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. The names of the author(s) may not be used to endorse or promote
+#    products derived from this software without specific prior written
+#    permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
 
 import abc
 import datetime
 import re
 import socket
-import time
 import uuid
 
 # KIPP0001 : create session
@@ -19,11 +43,14 @@ import uuid
 # KIPP0009 : SSH Version
 # KIPP0010 : Terminal Size
 # KIPP0011 : Connection Lost
-# -- new event id's after this --
-# KIPP0012 : SSH direct-tcpip fwd request
 
 class Output(object):
 
+    """
+    This is the abstract base class intended to be inherited by kippo output plugins
+    Plugins require the mandatory methods: stop, start and handleLog
+    """
+
     __metaclass__ = abc.ABCMeta
 
     def __init__(self, cfg):
@@ -50,12 +77,12 @@ class Output(object):
 
     @abc.abstractmethod
     def start():
-        """Hook that can be used to set up connections in output plugins"""
+        """Abstract method to initialize output plugins"""
         pass
 
     @abc.abstractmethod
     def stop():
-        """Hook that can be used to close connections in output plugins"""
+        """Abstract method to shut down output plugins"""
         pass
 
     # this is the main emit() hook that gets called by the the Twisted logging