add error handle: ElementContainer

src/main/java/packet/Data.java

@@ -45,7 +45,7 @@ public class Data implements IEncodingAble, InteractWithField {
      *
      * @return
      */
-    public String toUri() {
+    public String toUri() throws ComponentException {
         if (this.name == null) {
             return "";
         }