diff --git a/src/main/java/com/ntlab/irisserver/entities/RoomJson.java b/src/main/java/com/ntlab/irisserver/entities/RoomJson.java
new file mode 100644
index 0000000..42dab40
--- /dev/null
+++ b/src/main/java/com/ntlab/irisserver/entities/RoomJson.java
@@ -0,0 +1,4 @@
+package com.ntlab.irisserver.entities;
+
+public class RoomJson {
+}