diff --git a/Calendar/DisplayAdapter.py b/Calendar/DisplayAdapter.py
new file mode 100644
index 0000000..bda5a98
--- /dev/null
+++ b/Calendar/DisplayAdapter.py
@@ -0,0 +1,12 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+class DisplayAdapter (object):
+	"""Interface for CalendarDesign output channels"""
+	def render ():
+		raise NotImplementedError("Functions needs to be implemented")
+
+	def calibrate ():
+		raise NotImplementedError("Functions needs to be implemented")
+
+	def sleep ():
+		raise NotImplementedError("Functions needs to be implemented")
\ No newline at end of file