diff --git a/source/src/main/java/one/nem/lacerta/source/database/dao/VcsLogDao.java b/source/src/main/java/one/nem/lacerta/source/database/dao/VcsLogDao.java
new file mode 100644
index 00000000..9a9ea304
--- /dev/null
+++ b/source/src/main/java/one/nem/lacerta/source/database/dao/VcsLogDao.java
@@ -0,0 +1,4 @@
+package one.nem.lacerta.source.database.dao;
+
+public interface VcsLogDao {
+}
diff --git a/source/src/main/java/one/nem/lacerta/source/database/dao/VcsRevDao.java b/source/src/main/java/one/nem/lacerta/source/database/dao/VcsRevDao.java
new file mode 100644
index 00000000..9113be04
--- /dev/null
+++ b/source/src/main/java/one/nem/lacerta/source/database/dao/VcsRevDao.java
@@ -0,0 +1,4 @@
+package one.nem.lacerta.source.database.dao;
+
+public interface VcsRevDao {
+}