SEBA-405 Convert synchronizer framework to library

Change-Id: If8562f23dc15c7d18d7a8b040b33756708b3c5ec
diff --git a/lib/xos-synchronizer/xossynchronizer/exceptions.py b/lib/xos-synchronizer/xossynchronizer/exceptions.py
new file mode 100644
index 0000000..3589777
--- /dev/null
+++ b/lib/xos-synchronizer/xossynchronizer/exceptions.py
@@ -0,0 +1,25 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+class SynchronizerException(Exception):
+    pass
+
+
+class SynchronizerProgrammingError(SynchronizerException):
+    pass
+
+
+class SynchronizerConfigurationError(SynchronizerException):
+    pass