typo, javadoc,code cleanup

common/src/main/java/com/alibaba/otter/canal/common/CanalLifeCycle.java

@@ -6,9 +6,9 @@ package com.alibaba.otter.canal.common;
  */
 public interface CanalLifeCycle {
 
-    public void start();
+    void start();
 
-    public void stop();
+    void stop();
 
-    public boolean isStart();
+    boolean isStart();
 }

common/src/main/java/com/alibaba/otter/canal/common/alarm/CanalAlarmHandler.java

@@ -14,8 +14,7 @@ public interface CanalAlarmHandler extends CanalLifeCycle {
      * 发送对应destination的报警
      * 
      * @param destination
-     * @param title
      * @param msg
      */
-    public void sendAlarm(String destination, String msg);
+    void sendAlarm(String destination, String msg);
 }