diff --git a/source/src/main/java/one/nem/lacerta/source/database/entity/VcsLogEntity.java b/source/src/main/java/one/nem/lacerta/source/database/entity/VcsLogEntity.java
new file mode 100644
index 00000000..5848a74d
--- /dev/null
+++ b/source/src/main/java/one/nem/lacerta/source/database/entity/VcsLogEntity.java
@@ -0,0 +1,4 @@
+package one.nem.lacerta.source.database.entity;
+
+public class VcsLogEntity {
+}
diff --git a/source/src/main/java/one/nem/lacerta/source/database/entity/VcsRevEntity.java b/source/src/main/java/one/nem/lacerta/source/database/entity/VcsRevEntity.java
index 31cb4df9..e262b116 100644
--- a/source/src/main/java/one/nem/lacerta/source/database/entity/VcsRevEntity.java
+++ b/source/src/main/java/one/nem/lacerta/source/database/entity/VcsRevEntity.java
@@ -1,4 +1,5 @@
 package one.nem.lacerta.source.database.entity;
 
 public class VcsRevEntity {
+    // TODO-rca: 未実装
 }