checkstyle.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.3//EN" "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
<module name="Checker">
  <module name="JavadocPackage"/>
    <module name="TreeWalker">
        <!-- https://github.com/checkstyle/checkstyle/issues/7275#issuecomment-557212138 -->
        <!-- Remove `cache` field from TreeWalker in Checkstyle 8.0. Author: rnveach #2883 -->
        <!-- https://checkstyle.org/releasenotes.html#Release_8.19 -->
        <!-- https://github.com/checkstyle/checkstyle/issues/2883 -->
        <!-- <property name="cacheFile" value="${checkstyle.cache.file}"/> -->

        <!-- Checks for Javadoc comments.                     -->
        <!-- See http://checkstyle.sf.net/config_javadoc.html -->
        <module name="JavadocMethod"/>
        <module name="JavadocType"/>
        <module name="JavadocVariable"/>
        <module name="JavadocStyle"/>

    <module name="GenericWhitespace"/>
        <!-- Checks for Size Violations.                    -->
        <!-- See http://checkstyle.sf.net/config_sizes.html -->
  </module>
  <module name="LineLength">
    <!-- Configuring the check to accept lines up to 160 characters long -->
        <property name="max" value="160"/>
    <!-- 
          Ignore Javadoc comments since references to other elements (@see
          tag, etc.) may get rather long and should not be truncated.
          
          source: http://www.smartics.eu/config-smartics-checkstyle/checkstyle-documentation.html
      -->
        <property name="ignorePattern" value="^\s*\*\s*[^\s]+.+$"/>
  </module>
  <module name="FileTabCharacter">
    <property name="eachLine" value="true"/>
    </module>
</module>