修改pom.xml文件,新增各子系统接口文件

Change-Id: Iec5c52a44f09accbda6c0e227b55f7572a06204a
diff --git a/src/main/java/object/Post.java b/src/main/java/object/Post.java
new file mode 100644
index 0000000..a61bc3e
--- /dev/null
+++ b/src/main/java/object/Post.java
@@ -0,0 +1,5 @@
+package object;
+
+public class Post {
+    
+}