Another round of findbug and checkstyle fixes.

Every time I pick up changes from upstream I seem to spend 20 minutes
fixing things that can be easily caught by static code analysis.
make jade helper static
Merge pull request #222 from hgschmie/findbugs-3

Another round of findbug and checkstyle fixes.
Merge pull request #224 from hgschmie/jadehelper

make jade helper static
Referring to Logger.ROOT_LOGGER_NAME is ambiguous, causing an Eclipse warning
Upgrade to try-with-resources
Merge pull request #226 from stevenschlansker/warning-patrol

Clean up the last few warnings
fix likely typo