Java source normalization (fixes #516)

[svanteschubert]

I have fixed the same problem today for the ODF Toolkit: tdf/odftoolkit#50

Using the Google Java Formatter:
https://github.com/google/google-java-format

Capsulated by the following Maven plugin:
https://github.com/Cosium/maven-git-code-format
adding a pre-commit-hook for checking the Java code.

You might reproduce the patch by:

1. Add the plugin to the pom.xml (as in the first commit)
2. Start manual formatting on the sources by command line via:
   mvn -X git-code-format:format-code -Dgcf.globPattern=**/*
   There will be half a dozen problems with comments of unused imports within the Java imports, which breaks the formatting, but after the manual fixes, you will come to my patch.

NOTE: The ODF Toolkit is using in addition to the above Java formatter a whitespace formatter for the text files:
https://ec4j.github.io/editorconfig-maven-plugin/

See in https://github.com/tdf/odftoolkit/blob/master/pom.xml#L257
and its configs:
https://github.com/tdf/odftoolkit/blob/master/.editorconfig

[codecov]

Codecov Report

Merging #631 into integration will increase coverage by 0.05%.
The diff coverage is 58.31%.

@@                Coverage Diff                @@
##             integration     #631      +/-   ##
=================================================
+ Coverage          45.63%   45.69%   +0.05%     
  Complexity          1046     1046              
=================================================
  Files                 57       57              
  Lines               9149     8783     -366     
  Branches            1687     1679       -8     
=================================================
- Hits                4175     4013     -162     
+ Misses              4424     4225     -199     
+ Partials             550      545       -5     

Impacted Files	Coverage Δ	Complexity Δ
...u/harvard/hul/ois/jhove/AnalogDigitalFlagType.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
.../edu/harvard/hul/ois/jhove/ByteArrayXMPSource.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...du/harvard/hul/ois/jhove/CoreMessageConstants.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
.../edu/harvard/hul/ois/jhove/CountedInputStream.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
.../src/main/java/edu/harvard/hul/ois/jhove/Dump.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...java/edu/harvard/hul/ois/jhove/JhoveException.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
.../main/java/edu/harvard/hul/ois/jhove/MacStuff.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...ain/java/edu/harvard/hul/ois/jhove/ModuleBase.java	51.27% <ø> (+0.24%)	74.00 <0.00> (ø)
...ain/java/edu/harvard/hul/ois/jhove/ModuleInfo.java	57.14% <ø> (ø)	1.00 <0.00> (ø)
...a/edu/harvard/hul/ois/jhove/NisoImageMetadata.java	75.99% <ø> (ø)	182.00 <0.00> (ø)
... and 76 more

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[svanteschubert]

Please note, that this normalization step causes a lot of noise to prevent noise in the future.
You might want to consider to merge other pull requests prior, or the pull requests have to do the normalization themselves (fixes all the import problems). Perhaps those import problems should be separated first? Your call :-)

[carlwilson]

Now we're back up and running properly, I'm interested. I'll look to reproduce this once 1.26 is out of the door.