RFR: 8274893: Update java.desktop classes to use try-with-resources [v2]

[Andrey Turbanov]

> 8274893: Update java.desktop classes to use try-with-resources

Andrey Turbanov has updated the pull request incrementally with two additional commits since the last revision:

 - 8274893: Update java.desktop classes to use try-with-resources
   close nested resources too
 - [PATCH] Use try-with-resources to close resources in java.desktop

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5817/files
  - new: https://git.openjdk.java.net/jdk/pull/5817/files/6db4fd8e..13bdbc0d

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5817&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5817&range=00-01

  Stats: 16 lines in 4 files changed: 9 ins; 0 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5817.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5817/head:pull/5817

PR: https://git.openjdk.java.net/jdk/pull/5817