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">
    <!--
        If you set the basedir property below, then all reported file
        names will be relative to the specified directory. See
        http://checkstyle.sourceforge.net/config.html#Checker
    -->
    <!--property name="basedir" value="${baseDir}"/-->
    <property name="charset" value="UTF-8"/>
    <property name="localeCountry" value="US"/>
    <property name="localeLanguage" value="en"/>
    <property name="fileExtensions" value="java, xml, properties"/>
    <module name="SuppressionFilter">
        <property name="optional" value="false"/>
    </module>
    <module name="TreeWalker">
        <property name="tabWidth" value="4"/>
        <module name="IllegalImport"/>
        <module name="UnusedImports"/>
        <module name="AvoidStarImport"/>
        <module name="AvoidStaticImport"/>
        <module name="UpperEll"/>
        <module name="ArrayTrailingComma"/>
        <module name="EmptyLineSeparator">
            <property name="allowNoEmptyLineBetweenFields" value="true"/>
            <property name="allowMultipleEmptyLines" value="false"/>
            <property name="allowMultipleEmptyLinesInsideClassMembers" value="false"/>
        </module>
        <module name="GenericWhitespace"/>
        <module name="MethodParamPad"/>
        <module name="NoLineWrap"/>
        <module name="NoWhitespaceBefore"/>
        <module name="ParenPad"/>
        <module name="SingleSpaceSeparator"/>
        <module name="TypecastParenPad"/>
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround"/>
    </module>
    <module name="NewlineAtEndOfFile">
        <property name="lineSeparator" value="lf"/>
    </module>
    <module name="FileTabCharacter"/>
</module>