fix: suppress checkstyle for certain methods

[alicejli]

Some PRs are failing checkstyle tests:

Error:  src/main/java/dlp/snippets/RiskAnalysisKMap.java:[18,1] (whitespace) EmptyLineSeparator: '//' should be separated from previous line.
Error:  src/main/java/dlp/snippets/RiskAnalysisKMap.java:[53,7] (naming) AbbreviationAsWordInName: Abbreviation in name 'RiskAnalysisKMap' must contain no more than '1' consecutive capital letters.
Error:  src/main/java/dlp/snippets/RiskAnalysisKMap.java:[65,22] (naming) AbbreviationAsWordInName: Abbreviation in name 'calculateKMap' must contain no more than '1' consecutive capital letters.
Error:  src/main/java/dlp/snippets/RiskAnalysisLDiversity.java:[55,7] (naming) AbbreviationAsWordInName: Abbreviation in name 'RiskAnalysisLDiversity' must contain no more than '1' consecutive capital letters.
Error:  src/main/java/dlp/snippets/RiskAnalysisLDiversity.java:[67,22] (naming) AbbreviationAsWordInName: Abbreviation in name 'calculateLDiversity' must contain no more than '1' consecutive capital letters.
Error:  src/main/java/dlp/snippets/RiskAnalysisKAnonymity.java:[52,7] (naming) AbbreviationAsWordInName: Abbreviation in name 'RiskAnalysisKAnonymity' must contain no more than '1' consecutive capital letters.
Error:  src/main/java/dlp/snippets/RiskAnalysisKAnonymity.java:[64,22] (naming) AbbreviationAsWordInName: Abbreviation in name 'calculateKAnonymity' must contain no more than '1' consecutive capital letters.
``

This updates the empty line error, and suppresses the Checkstyle check for methods that are correctly formatted in camelCase.