Github user davidyan74 commented on a diff in the pull request:

    https://github.com/apache/incubator-apex-core/pull/171#discussion_r45100660
  
    --- Diff: 
common/src/main/java/com/datatorrent/common/util/ScheduledThreadPoolExecutor.java
 ---
    @@ -22,13 +22,13 @@
     import org.slf4j.Logger;
     import org.slf4j.LoggerFactory;
     
    -
     /**
      * <p>ScheduledThreadPoolExecutor class.</p>
      *
      * @since 0.3.2
      */
    -public class ScheduledThreadPoolExecutor extends 
java.util.concurrent.ScheduledThreadPoolExecutor implements 
ScheduledExecutorService
    +public class ScheduledThreadPoolExecutor extends 
java.util.concurrent.ScheduledThreadPoolExecutor implements
    +    ScheduledExecutorService
    --- End diff --
    
    line break should be before the implements keyword


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