checkstyle.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE module PUBLIC "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN" "https://checkstyle.org/dtds/configuration_1_3.dtd">

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

    <module name="FileTabCharacter">
        <property name="eachLine" value="true" />
    </module>
    <module name="LineLength" />
    <module name="NewlineAtEndOfFile">
        <property name="lineSeparator" value="lf" />
    </module>
    <module name="TreeWalker">
        <module name="AnnotationLocation">
            <property name="allowSamelineSingleParameterlessAnnotation" value="false" />
        </module>
        <module name="AtclauseOrder" />
        <module name="CatchParameterName" />
        <module name="ClassTypeParameterName" />
        <module name="CommentsIndentation" />
        <module name="DefaultComesLast" />
        <module name="EmptyBlock">
            <property name="option" value="TEXT" />
            <property name="tokens" value="LITERAL_TRY, LITERAL_FINALLY, LITERAL_IF, LITERAL_ELSE, LITERAL_SWITCH" />
        </module>
        <module name="EmptyCatchBlock" />
        <module name="EmptyLineSeparator">
            <property name="allowMultipleEmptyLines" value="false" />
            <property name="allowMultipleEmptyLinesInsideClassMembers" value="false" />
            <property name="tokens" value="PACKAGE_DEF, IMPORT, STATIC_IMPORT, CLASS_DEF, INTERFACE_DEF, ENUM_DEF, STATIC_INIT, INSTANCE_INIT, METHOD_DEF, CTOR_DEF" />
        </module>
        <module name="EmptyStatement" />
        <module name="EqualsHashCode" />
        <module name="FallThrough" />
        <module name="GenericWhitespace" />
        <module name="IllegalImport" />
        <module name="Indentation" />
        <module name="InterfaceTypeParameterName" />
        <module name="InvalidJavadocPosition" />
        <module name="JavadocContentLocationCheck" />
        <module name="JavadocMethod" />
        <module name="JavadocParagraph">
            <property name="allowNewlineParagraph" value="false"/>
        </module>
        <module name="JavadocTagContinuationIndentation" />
        <module name="JavadocType" />
        <module name="LambdaParameterName" />
        <module name="LeftCurly" />
        <module name="LocalVariableName" />
        <module name="MemberName" />
        <module name="MethodName" />
        <module name="MethodParamPad" />
        <module name="MethodTypeParameterName" />
        <module name="MissingJavadocMethod" />
        <module name="MissingJavadocPackage" />
        <module name="MissingJavadocType" />
        <module name="MissingSwitchDefault" />
        <module name="ModifierOrder" />
        <module name="MultipleVariableDeclarations" />
        <module name="NeedBraces" />
        <module name="NoFinalizer" />
        <module name="NoLineWrap" />
        <module name="NonEmptyAtclauseDescription" />
        <module name="OneStatementPerLine" />
        <module name="OneTopLevelClass" />
        <module name="OperatorWrap">
            <property name="option" value="eol" />
        </module>
        <module name="OuterTypeFilename" />
        <module name="OverloadMethodsDeclarationOrder" />
        <module name="PackageName" />
        <module name="ParameterName" />
        <module name="ParenPad" />
        <module name="RedundantModifier" />
        <module name="Regexp">
            <property name="format" value="[ \t]+$" />
            <property name="illegalPattern" value="true" />
            <property name="message" value="Trailing whitespace" />
        </module>
        <module name="RequireThis" />
        <module name="RightCurly" />
        <module name="SeparatorWrap">
            <property name="tokens" value="COMMA" />
            <property name="option" value="eol" />
        </module>
        <module name="SeparatorWrap">
            <property name="tokens" value="DOT" />
            <property name="option" value="nl" />
        </module>
        <module name="SimplifyBooleanExpression" />
        <module name="SimplifyBooleanReturn" />
        <module name="SummaryJavadocCheck" />
        <module name="TodoComment">
            <property name="format" value="(TODO)|(FIXME)" />
            <message key="todo.match" value="Resolve unexpected comment." />
        </module>
        <module name="TypeName" />
        <module name="UpperEll" />
        <module name="VariableDeclarationUsageDistance" />
        <module name="WhitespaceAround" />
    </module>
</module>