checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
        "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
        "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">
<module name="Checker">

    <module name="FileTabCharacter"/>

    <module name="NewlineAtEndOfFile"/>

    <module name="RegexpSingleline">
        <property name="format" value="\s+$"/>
        <property name="minimum" value="0"/>
        <property name="maximum" value="0"/>
        <property name="message" value="Line has trailing spaces."/>
    </module>

    <module name="Translation"/>

    <module name="TreeWalker">
        <module name="AbbreviationAsWordInName"/>
        <module name="AbstractClassName"/>
        <module name="ArrayTypeStyle"/>
        <module name="ConstantName"/>
        <module name="EmptyCatchBlock">
            <property name="exceptionVariableName" value="ignored"/>
        </module>
        <module name="EmptyStatement"/>
        <module name="EqualsHashCode"/>
        <module name="FinalClass"/>
        <module name="HideUtilityClassConstructor"/>
        <module name="IllegalImport"/>
        <module name="Indentation"/>
        <module name="LeftCurly"/>
        <module name="LocalFinalVariableName"/>
        <module name="LocalVariableName"/>
        <module name="MemberName"/>
        <module name="MethodName"/>
        <module name="MethodParamPad"/>
        <module name="MultipleVariableDeclarations"/>
        <module name="MutableException"/>
        <module name="NeedBraces"/>
        <module name="NoWhitespaceAfter"/>
        <module name="NoWhitespaceBefore"/>
        <module name="OuterTypeFilename"/>
        <module name="ParameterAssignment"/>
        <module name="ParameterName"/>
        <module name="ParenPad"/>
        <module name="RedundantImport"/>
        <module name="RightCurly"/>
        <module name="SimplifyBooleanExpression"/>
        <module name="SimplifyBooleanReturn"/>
        <module name="StringLiteralEquality"/>
        <module name="TypecastParenPad"/>
        <module name="TypeName"/>
        <module name="UnnecessaryParentheses"/>
        <module name="UnusedImports"/>
        <module name="UpperEll"/>
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround"/>
    </module>
</module>