checkstyle.xml

<?xml version="1.0"?>
<!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="NewlineAtEndOfFile">
        <property name="lineSeparator" value="lf"/>
    </module>
    <module name="LineLength">
        <property name="max" value="120"/>
        <property name="ignorePattern" value="import"/>
    </module>
    <module name="TreeWalker">
        <module name="Regexp">
            <property name="format" value="[ \t]+$"/>
            <property name="illegalPattern" value="true"/>
            <property name="message" value="Trailing whitespace"/>
        </module>
        <module name="Indentation">
            <property name="basicOffset" value="4"/>
            <property name="lineWrappingIndentation" value="8"/>
        </module>
        <module name="NeedBraces"/>
        <module name="RedundantImport"/>
        <module name="UnusedImports">
            <property name="processJavadoc" value="true"/>
        </module>
        <module name="AvoidStarImport"/>
        <module name="ConstantName"/>
        <module name="EmptyBlock"/>
        <module name="EmptyLineSeparator">
            <property name="allowMultipleEmptyLines" value="false"/>
            <property name="allowNoEmptyLineBetweenFields" value="true"/>
        </module>
        <module name="JavadocType"/>
        <module name="NoWhitespaceAfter"/>
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround">
            <property name="allowEmptyTypes" value="true"/>
        </module>
    </module>
</module>