@@ -0,0 +1,169 @@
+package ru.nsu.ccfit.bogush;%0A%0Apublic interface UserListChangeListener %7B%0A%09void userEntered(User user);%0A%09void userLeft(User user);%0A%09void userListReceived(User%5B%5D users);%0A%7D%0A

Add user-list change listener interface