checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
        "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
        "http://checkstyle.sourceforge.net/dtds/configuration_1_3.dtd">

<module name="Checker">
    <property name="charset" value="UTF-8"/>
    <property name="fileExtensions" value="java"/>

    <!-- TreeWalker Checks -->
    <module name="TreeWalker">
        <module name="SuppressWarningsHolder" />

        <module name="AvoidStarImport"/>
        <module name="AvoidEscapedUnicodeCharacters">
            <property name="allowEscapesForControlCharacters" value="true"/>
            <property name="allowByTailComment" value="true"/>
            <property name="allowNonPrintableEscapes" value="true"/>
        </module>
        <module name="NoLineWrap"/>
        <module name="OuterTypeFilename"/>
        <module name="UnusedImports"/>
    </module>
</module>