1 files changed, 2 insertions, 2 deletions
diff --git a/src/main/java/com/juick/service/component/MessageReadEvent.java b/src/main/java/com/juick/service/component/MessageReadEvent.java
index b070c8cb..b2af4a08 100644
--- a/src/main/java/com/juick/service/component/MessageReadEvent.java
+++ b/src/main/java/com/juick/service/component/MessageReadEvent.java
@@ -4,7 +4,7 @@ import com.juick.Message;
 import com.juick.User;
 import org.springframework.context.ApplicationEvent;
 
-import java.util.List;
+import javax.annotation.Nonnull;
 
 public class MessageReadEvent extends ApplicationEvent {
     private User user;
@@ -14,7 +14,7 @@ public class MessageReadEvent extends ApplicationEvent {
      *
      * @param source the object on which the event initially occurred (never {@code null})
      */
-    public MessageReadEvent(Object source, User user, Message message) {
+    public MessageReadEvent(Object source, @Nonnull User user, Message message) {
         super(source);
         this.user = user;
         this.message = message;