checkstyle.xml

<?xml version="1.0" encoding="UTF-8"?>
<!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="TreeWalker">
        <module name="MissingDeprecated"/>
        <module name="MissingOverride"/>
        <module name="PackageAnnotation"/>

        <module name="EmptyBlock">
            <property name="option" value="text"/>
        </module>
        <module name="LeftCurly">
            <property name="maxLineLength" value="120"/>
        </module>
        <module name="NeedBraces"/>
        <module name="RightCurly"/>
        <module name="AvoidNestedBlocks"/>

        <module name="InterfaceIsType"/>
        <module name="InnerTypeLast"/>

        <module name="CovariantEquals"/>
        <module name="EmptyStatement"/>
        <module name="EqualsAvoidNull"/>
        <module name="EqualsHashCode"/>
        <module name="InnerAssignment"/>
        <module name="MissingSwitchDefault"/>
        <module name="ModifiedControlVariable"/>
        <module name="SimplifyBooleanExpression"/>
        <module name="SimplifyBooleanReturn"/>
        <module name="StringLiteralEquality"/>
        <module name="PackageDeclaration"/>
        <module name="IllegalType"/>
        <module name="MultipleVariableDeclarations"/>
        <module name="OneStatementPerLine"/>

        <module name="IllegalImport"/>

        <module name="ArrayTypeStyle"/>
        <module name="Indentation"/>
        <module name="OuterTypeFilename"/>

        <module name="ModifierOrder"/>

        <module name="GenericWhitespace"/>
        <module name="MethodParamPad"/>
        <module name="ParenPad"/>
        <module name="TypecastParenPad"/>
    </module>
    <module name="FileTabCharacter"/>
</module>