diff -r 000000000000 -r 747fc65e13e2 src/ztfy/baseskin/layer.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/ztfy/baseskin/layer.py	Sun May 11 02:03:37 2014 +0200
@@ -0,0 +1,23 @@
+#
+# Copyright (c) 2012 Thierry Florac <tflorac AT onf.fr>
+# All Rights Reserved.
+#
+
+
+# import standard packages
+
+# import Zope3 interfaces
+from z3c.form.interfaces import IFormLayer
+from z3c.formui.interfaces import IFormUILayer
+from z3c.jsonrpc.layer import IJSONRPCLayer
+from z3c.layer.pagelet import IPageletBrowserLayer
+
+# import local interfaces
+
+# import Zope3 packages
+
+# import local packages
+
+
+class IBaseSkinLayer(IFormLayer, IFormUILayer, IPageletBrowserLayer, IJSONRPCLayer):
+    """Base skin layer"""