refactor: BloomFilter

[alxkm]

Adding Javadocs.
Improving tests coverage.

• 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 42.39%. Comparing base (777de1d) to head (4b19bff).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #5325   +/-   ##
=========================================
  Coverage     42.39%   42.39%           
  Complexity     2632     2632           
=========================================
  Files           522      522           
  Lines         15524    15524           
  Branches       2958     2958           
=========================================
  Hits           6582     6582           
  Misses         8648     8648           
  Partials        294      294           

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