test: add demos

examples/move-demo/src/wowo/eext/sub/BaseFace.java

 package wowo.eext.sub;
 
-public class BaseFace {
+public class BaseFace implements IBase, IFace {
 }

examples/move-demo/src/wowo/eext/sub/IBase.java

+package wowo.eext.sub;
+
+interface IBase {
+}

examples/move-demo/src/wowo/eext/sub/IFace.java

+package wowo.eext.sub;
+
+public interface IFace {
+
+}