Documentation cleanup

Ticket:
Reviewed By:
Testing Done:

- these changes are mainly related to api doc generation using sphinx

ifupdown/exceptions.py

@@ -0,0 +1,23 @@
+#!/usr/bin/python
+#
+# Copyright 2014 Cumulus Networks, Inc. All rights reserved.
+# Author: Roopa Prabhu, roopa@cumulusnetworks.com
+#
+# ifupdown --
+#    exceptions
+#
+
+class Error(Exception):
+    """Base class for exceptions in ifupdown"""
+
+    pass
+
+class ifaceNotFoundError(Error):
+    pass
+
+
+class invalidValueError(Error):
+    pass
+
+class errorReadingStateError(Error):
+    pass