diff --git a/mirai-core/src/main/java/net/mamoe/mirai/Robot.java b/mirai-core/src/main/java/net/mamoe/mirai/Robot.java
index e59cf3594..459ef78bb 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/Robot.java
+++ b/mirai-core/src/main/java/net/mamoe/mirai/Robot.java
@@ -1,6 +1,8 @@
 package net.mamoe.mirai;
 
 import lombok.Getter;
+import net.mamoe.mirai.contact.Contact;
+import net.mamoe.mirai.message.Message;
 import net.mamoe.mirai.network.RobotNetworkHandler;
 import net.mamoe.mirai.utils.config.MiraiConfigSection;
 
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/message/Message.java b/mirai-core/src/main/java/net/mamoe/mirai/message/Message.java
new file mode 100644
index 000000000..672de6e39
--- /dev/null
+++ b/mirai-core/src/main/java/net/mamoe/mirai/message/Message.java
@@ -0,0 +1,4 @@
+package net.mamoe.mirai.message;
+
+public class Message {
+}