moved code

shared/mongodb/src/exceptions/__init__.py

@@ -0,0 +1 @@
+from .no_document_found import NoDocumentFoundException

shared/mongodb/src/exceptions/no_document_found.py

@@ -0,0 +1,5 @@
+"""Definition of database exception."""
+
+
+class NoDocumentFoundException(Exception):
+    """Database exception for when no documents are found."""