init

src/main/java/com/yutou/qqbot/interfaces/DownloadInterface.java

@@ -0,0 +1,9 @@
+package com.yutou.qqbot.interfaces;
+
+import java.io.File;
+
+public abstract class DownloadInterface {
+    public void onDownloading(double soFarBytes, double totalBytes){};
+    public void onDownload(File file){};
+    public void onError(Exception e){};
+}