Some javac unit tests aren't reliably closing open files. Many were written prior to (or without utilizing) try-with-resources.
Leaving files and other resources open can cause problems during automated builds, etc. This patch updates these tests to use try-with-resource. Side note: there is at least one unit test that intentionally leaves a file open - `diags/examples/ProcUnclosedTypeFiles/processors/AnnoProc.java`. ------------- Commit messages: - Use try-with-resources in unit tests to ensure files are closed. Changes: https://git.openjdk.org/jdk/pull/12609/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12609&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8302685 Stats: 445 lines in 58 files changed: 54 ins; 205 del; 186 mod Patch: https://git.openjdk.org/jdk/pull/12609.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12609/head:pull/12609 PR: https://git.openjdk.org/jdk/pull/12609
