[jira] [Created] (HDFS-8546) Use try with resources in DataStorage and Storage

[Andrew Wang (JIRA)]

Andrew Wang created HDFS-8546:
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             Summary: Use try with resources in DataStorage and Storage
                 Key: HDFS-8546
                 URL: https://issues.apache.org/jira/browse/HDFS-8546
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: datanode
    Affects Versions: 2.7.0
            Reporter: Andrew Wang
            Assignee: Andrew Wang
            Priority: Minor


We have some old-style try/finally to close files in DataStorage and Storage, 
let's update them.

Also a few small cleanups:
* Actually check that tryLock returns a FileLock in isPreUpgradableLayout
* Remove unused parameter from writeProperties
* Add braces for one-line if statements per coding style



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