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="NewlineAtEndOfFile">
        <property name="lineSeparator" value="lf"/>
    </module>
    <module name="FileLength"/>
    <module name="FileTabCharacter"/>
    <module name="RegexpSingleline">
        <property name="format" value="\s+$"/>
        <property name="message" value="Line has trailing spaces."/>
    </module>
    <module name="RegexpMultiline">
        <property name="format" value="\r?\n[\t ]*\r?\n[\t ]*\r?\n"/>
        <property name="message" value="Unnecessary consecutive lines"/>
    </module>
    <module name="RegexpSingleline">
        <property name="format" value="/\*\* +\p{javaLowerCase}"/>
        <property name="fileExtensions" value="java"/>
        <property name="message" value="First sentence in a comment should start with a capital letter"/>
    </module>
    <module name="RegexpMultiline">
        <property name="format" value="/\*\*\W+\* +\p{javaLowerCase}"/>
        <property name="fileExtensions" value="java"/>
        <property name="message" value="First sentence in a comment should start with a capital letter"/>
    </module>
    <module name="TreeWalker">
        <module name="ConstantName"/>
        <module name="LocalFinalVariableName"/>
        <module name="LocalVariableName"/>
        <module name="MemberName"/>
        <module name="MethodName"/>
        <module name="MethodLength"/>
        <module name="PackageName"/>
        <module name="ParameterName"/>
        <module name="StaticVariableName"/>
        <module name="TypeName"/>
        <module name="IllegalImport"/>
        <module name="UnusedImports">
            <property name="processJavadoc" value="true"/>
        </module>
        <module name="LineLength">
            <property name="max" value="170"/>
        </module>
        <module name="GenericWhitespace"/>
        <module name="EmptyForIteratorPad"/>
        <module name="MethodParamPad"/>
        <module name="NoWhitespaceAfter">
            <property name="tokens" value="BNOT, DEC, DOT, INC, LNOT, UNARY_MINUS, UNARY_PLUS"/>
        </module>
        <module name="NoWhitespaceBefore"/>
        <module name="OperatorWrap"/>
        <module name="ParenPad"/>
        <module name="OneTopLevelClass"/>
        <module name="TypecastParenPad"/>
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround"/>
        <module name="LeftCurly"/>
        <module name="RightCurly"/>
        <module name="CovariantEquals"/>
        <module name="EmptyStatement"/>
        <module name="EqualsAvoidNull"/>
        <module name="EqualsHashCode"/>
        <module name="IllegalInstantiation"/>
        <module name="MissingSwitchDefault"/>
        <module name="SimplifyBooleanExpression"/>
        <module name="SimplifyBooleanReturn"/>
        <module name="InterfaceIsType"/>
        <module name="FinalClass"/>
        <module name="ArrayTypeStyle"/>
        <module name="UpperEll"/>
        <module name="FinalParameters"/>
        <module name="ArrayTrailingComma"/>
        <module name="AvoidInlineConditionals"/>
        <module name="DeclarationOrder"/>
        <module name="DefaultComesLast"/>
        <module name="ExplicitInitialization"/>
        <module name="FallThrough"/>
        <module name="FinalLocalVariable"/>
        <module name="HiddenField">
            <property name="ignoreConstructorParameter" value="true"/>
            <property name="ignoreSetter" value="true"/>
            <property name="setterCanReturnItsClass" value="true"/>
        </module>
        <module name="IllegalCatch"/>
        <module name="IllegalThrows"/>
        <module name="IllegalToken"/>
        <module name="IllegalTokenText"/>
        <module name="IllegalType"/>
        <module name="InnerAssignment"/>
    </module>
</module>