style: include NM_CLASS_NAMING_CONVENTION and NM_METHOD_NAMING_CONVENTION

[vil02]

Continuation of #5122. The necessary code changes were probably done in:

• style: enable MethodName in CheckStyle #5182
• style: enable TypeName #5214

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 39.82%. Comparing base (a710fe1) to head (c9847b1).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5231      +/-   ##
============================================
- Coverage     39.82%   39.82%   -0.01%     
+ Complexity     2437     2436       -1     
============================================
  Files           517      517              
  Lines         15476    15476              
  Branches       2958     2958              
============================================
- Hits           6164     6163       -1     
  Misses         9022     9022              
- Partials        290      291       +1     

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