diff --git a/src/main/java/org/leolo/nrdatad/db/DatabaseManager.java b/src/main/java/org/leolo/nrdatad/db/DatabaseManager.java
new file mode 100644
index 0000000..ac0bb71
--- /dev/null
+++ b/src/main/java/org/leolo/nrdatad/db/DatabaseManager.java
@@ -0,0 +1,4 @@
+package org.leolo.nrdatad.db;
+
+public interface DatabaseManager {
+}
diff --git a/src/main/java/org/leolo/nrdatad/db/mariadb/DatabaseManager.java b/src/main/java/org/leolo/nrdatad/db/mariadb/DatabaseManager.java
new file mode 100644
index 0000000..1f08f2f
--- /dev/null
+++ b/src/main/java/org/leolo/nrdatad/db/mariadb/DatabaseManager.java
@@ -0,0 +1,5 @@
+package org.leolo.nrdatad.db.mariadb;
+
+public class DatabaseManager implements org.leolo.nrdatad.db.DatabaseManager{
+
+}
diff --git a/src/test/java/org/leolo/nrdatad/db/test/DatabaseManager.java b/src/test/java/org/leolo/nrdatad/db/test/DatabaseManager.java
new file mode 100644
index 0000000..2424f59
--- /dev/null
+++ b/src/test/java/org/leolo/nrdatad/db/test/DatabaseManager.java
@@ -0,0 +1,4 @@
+package org.leolo.nrdatad.db.test;
+
+public class DatabaseManager implements org.leolo.nrdatad.db.DatabaseManager {
+}