diff --git a/src/main/java/it/polimi/ingsw/gc14/ErrorType.java b/src/main/java/it/polimi/ingsw/gc14/ErrorType.java
new file mode 100644
index 0000000..4b62dff
--- /dev/null
+++ b/src/main/java/it/polimi/ingsw/gc14/ErrorType.java
@@ -0,0 +1,5 @@
+package it.polimi.ingsw.gc14;
+
+public enum ErrorType {
+    USERNAME_ALREADY_EXISTS,WRONG_PLAYER_NUMBER,WRONG_GAME_ACTION,SERVER_CRASHED
+}