Added ABCs

src/multi_install/service/application_service.py

@@ -1,4 +1,7 @@
-class ApplicationService:
+from multi_install.abc.application_service_abc import ApplicationServiceABC
+
+
+class ApplicationService(ApplicationServiceABC):
 
     def __init__(self):
         pass

src/multi_install/service/collection_service.py

@@ -1,4 +1,7 @@
-class CollectionService:
+from multi_install.abc.collection_service_abc import CollectionServiceABC
+
+
+class CollectionService(CollectionServiceABC):
 
     def __init__(self):
         pass