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/tracker/Tracker.java b/src/main/java/tracker/Tracker.java
new file mode 100644
index 0000000..e1165b2
--- /dev/null
+++ b/src/main/java/tracker/Tracker.java
@@ -0,0 +1,5 @@
+package tracker;
+
+// public class Tracker implements TrackerInterface {
+    
+// }