diff --git a/src/functions/mod.rs b/src/functions/mod.rs
new file mode 100644
index 0000000..c62116d
--- /dev/null
+++ b/src/functions/mod.rs
@@ -0,0 +1,25 @@
+/*
+ * advotracker - Hotline tackingtool for Advocats
+ *
+ * Copyright 2019 Ralf Zerres <ralf.zerres@networkx.de>
+ * SPDX-License-Identifier: (0BSD or MIT)
+ */
+
+// table specific functions
+/// module handling database connections
+pub mod db_connection;
+
+/// module handling harms
+pub mod harms;
+
+/// module handling roles
+pub mod roles;
+
+/// module handling user roles
+pub mod user_roles;
+
+/// module handling users
+pub mod users;
+
+/// module handling functionalty tests
+pub mod tests;