diff --git a/watchtower/interface.go b/watchtower/interface.go
new file mode 100644
index 000000000..59b1b8486
--- /dev/null
+++ b/watchtower/interface.go
@@ -0,0 +1,14 @@
+package watchtower
+
+import (
+	"github.com/lightningnetwork/lnd/watchtower/lookout"
+	"github.com/lightningnetwork/lnd/watchtower/wtserver"
+)
+
+// DB abstracts the persistent functionality required to run the watchtower
+// daemon. It composes the database interfaces required by the lookout and
+// wtserver subsystems.
+type DB interface {
+	lookout.DB
+	wtserver.DB
+}