RFR: 8282: Spotbugs errors [v2]

[Marcus Hirt]

> Excluding spot bugs being overzealous.

Marcus Hirt has updated the pull request incrementally with one additional commit since the last revision:

  More excludes required

-------------

Changes:
  - all: https://git.openjdk.org/jmc/pull/598/files
  - new: https://git.openjdk.org/jmc/pull/598/files/d5ffa512..d4bcb6c1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=598&range=01
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=598&range=00-01

  Stats: 64 lines in 1 file changed: 63 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jmc/pull/598.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/598/head:pull/598

PR: https://git.openjdk.org/jmc/pull/598