checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN" "https://checkstyle.org/dtds/configuration_1_3.dtd">

<module name="Checker">
    <property name="fileExtensions" value="java"/>
    <module name="NewlineAtEndOfFile"/>

    <module name="TreeWalker">
        <module name="SuppressionCommentFilter"/>

        <module name="AvoidStarImport">
            <property name="allowStaticMemberImports" value="true"/>
        </module>

        <module name="NeedBraces">
            <property name="tokens" value="LITERAL_DO, LITERAL_ELSE, LITERAL_FOR, LITERAL_IF, LITERAL_WHILE"/>
            <property name="allowEmptyLoopBody" value="true"/>
        </module>
        <module name="WhitespaceAfter">
            <property name="tokens" value="COMMA, SEMI, TYPECAST, LITERAL_IF, LITERAL_ELSE, LITERAL_RETURN, LITERAL_WHILE, LITERAL_DO, LITERAL_FOR, LITERAL_FINALLY, DO_WHILE, ELLIPSIS, LITERAL_SWITCH, LITERAL_SYNCHRONIZED, LITERAL_TRY, LITERAL_CATCH, LAMBDA, LITERAL_YIELD, LITERAL_CASE, LITERAL_WHEN"/>
        </module>

        <module name="MatchXpath">
            <property name="query" value="//STATIC_IMPORT[./LITERAL_STATIC and not(.//STAR)]"/>
            <message key="matchxpath.match" value="Static imports should always use wildcard imports"/>
        </module>
    </module>
</module>