diff --git a/classes/Chat.py b/classes/Chat.py
new file mode 100644
index 000000000..e6c17335f
--- /dev/null
+++ b/classes/Chat.py
@@ -0,0 +1 @@
+__author__ = 'Byoungwoo'
diff --git a/classes/User.py b/classes/User.py
new file mode 100644
index 000000000..e6c17335f
--- /dev/null
+++ b/classes/User.py
@@ -0,0 +1 @@
+__author__ = 'Byoungwoo'