diff --git a/classes/__init__.py b/class/__init__.py
similarity index 100%
rename from classes/__init__.py
rename to class/__init__.py
diff --git a/class/chat.py b/class/chat.py
new file mode 100644
index 00000000..6e0c1799
--- /dev/null
+++ b/class/chat.py
@@ -0,0 +1,5 @@
+
+class Chat():
+  def __init__(self):
+    pass
+  pass
\ No newline at end of file
diff --git a/classes/contact.py b/class/contact.py
similarity index 100%
rename from classes/contact.py
rename to class/contact.py
diff --git a/class/file.py b/class/file.py
new file mode 100644
index 00000000..d03dbf33
--- /dev/null
+++ b/class/file.py
@@ -0,0 +1,7 @@
+
+import os
+
+class File():
+  def __init__(self, path):
+    # os.open(path,
+    pass
diff --git a/classes/message.py b/class/message.py
similarity index 100%
rename from classes/message.py
rename to class/message.py
diff --git a/class/user.py b/class/user.py
new file mode 100644
index 00000000..50c5ad24
--- /dev/null
+++ b/class/user.py
@@ -0,0 +1,5 @@
+
+
+class User():
+  def __init__(self, uid):
+    self.uid = uid
diff --git a/classes/Chat.py b/classes/Chat.py
deleted file mode 100644
index e6c17335..00000000
--- a/classes/Chat.py
+++ /dev/null
@@ -1 +0,0 @@
-__author__ = 'Byoungwoo'
diff --git a/classes/User.py b/classes/User.py
deleted file mode 100644
index e6c17335..00000000
--- a/classes/User.py
+++ /dev/null
@@ -1 +0,0 @@
-__author__ = 'Byoungwoo'
diff --git a/classes/file.py b/classes/file.py
deleted file mode 100644
index 77e8595d..00000000
--- a/classes/file.py
+++ /dev/null
@@ -1,3 +0,0 @@
-
-class File():
-  pass
\ No newline at end of file