RFR: 8274809: Update java.base classes to use try-with-resources [v4]

[Andrey Turbanov]

> 8274809: Update java.base classes to use try-with-resources

Andrey Turbanov has updated the pull request incrementally with one additional commit since the last revision:

  8274809: Update java.base classes to use try-with-resources
  fix review comments

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5818/files
  - new: https://git.openjdk.java.net/jdk/pull/5818/files/423c3069..3b05ec49

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5818&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5818&range=02-03

  Stats: 5 lines in 2 files changed: 2 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5818.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5818/head:pull/5818

PR: https://git.openjdk.java.net/jdk/pull/5818