checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
        "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
        "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">

<module name="Checker">
    <property name="charset" value="UTF-8"/>
    <module name="NewlineAtEndOfFile"/>
    <module name="FileLength">
        <property name="max" value="400"/>
    </module>
    <module name="FileTabCharacter"/>

    <module name="TreeWalker">

        <!-- Annotations -->
        <module name="MissingDeprecated"/>
        <module name="MissingOverride"/>
        <module name="SuppressWarnings"/>

        <!-- Blocks -->
        <module name="AvoidNestedBlocks"/>
        <module name="EmptyBlock"/>
        <module name="EmptyCatchBlock"/>
        <module name="LeftCurly"/>
        <module name="NeedBraces">
            <property name="allowSingleLineStatement" value="true"/>
        </module>
        <module name="RightCurly"/>

        <!-- Class design -->
        <module name="FinalClass"/>
        <module name="HideUtilityClassConstructor"/>
        <module name="InnerTypeLast"/>
        <module name="InterfaceIsType"/>
        <module name="MutableException"/>
        <module name="OneTopLevelClass"/>
        <module name="ThrowsCount">
            <property name="max" value="2"/>
        </module>
        <module name="VisibilityModifier"/>

        <!-- Coding -->
        <module name="ArrayTrailingComma"/>
        <module name="CovariantEquals"/>
        <module name="DeclarationOrder"/>
        <module name="DefaultComesLast"/>
        <module name="EmptyStatement"/>
        <module name="EqualsAvoidNull"/>
        <module name="EqualsHashCode"/>
        <module name="FallThrough"/>
        <module name="HiddenField">
            <property name="ignoreConstructorParameter" value="true"/>
            <property name="ignoreSetter" value="true"/>
        </module>
        <module name="IllegalCatch"/>
        <module name="IllegalThrows"/>
        <module name="IllegalToken"/>
        <module name="IllegalType"/>
        <module name="InnerAssignment"/>
        <module name="MagicNumber"/>
        <module name="MissingSwitchDefault"/>
        <module name="ModifiedControlVariable"/>
        <module name="MultipleStringLiterals">
            <property name="ignoreStringsRegexp" value='^(("")|(" ?, ?")|(".")|("\\."))$'/>
        </module>
        <module name="MultipleVariableDeclarations"/>
        <module name="NestedForDepth"/>
        <module name="NestedIfDepth"/>
        <module name="NestedTryDepth"/>
        <module name="NoClone"/>
        <module name="NoFinalizer"/>
        <module name="OneStatementPerLine"/>
        <module name="OverloadMethodsDeclarationOrder"/>
        <module name="PackageDeclaration"/>
        <module name="ParameterAssignment"/>
        <module name="SimplifyBooleanExpression"/>
        <module name="SimplifyBooleanReturn"/>
        <module name="StringLiteralEquality"/>
        <module name="VariableDeclarationUsageDistance"/>

        <!-- Imports -->
        <module name="AvoidStarImport"/>
        <module name="IllegalImport"/>
        <module name="ImportOrder">
            <property name="groups" value="*,javax,java"/>
            <property name="ordered" value="true"/>
            <property name="separated" value="false"/>
            <property name="option" value="bottom"/>
            <property name="sortStaticImportsAlphabetically" value="true"/>
        </module>
        <module name="RedundantImport"/>
        <module name="UnusedImports"/>

        <!-- Javadoc -->
        <module name="JavadocStyle"/>
        <module name="NonEmptyAtclauseDescription"/>
        <module name="SingleLineJavadoc"/>
        <module name="SummaryJavadocCheck"/>
        <module name="JavadocMethod">
            <property name="scope" value="protected"/>
        </module>
        <module name="JavadocType">
            <property name="scope" value="protected"/>
        </module>
        <module name="JavadocVariable">
            <property name="scope" value="protected"/>
        </module>

        <!-- Metrics -->
        <module name="BooleanExpressionComplexity">
            <property name="max" value="1"/>
        </module>
        <module name="ClassDataAbstractionCoupling">
            <property name="max" value="5"/>
        </module>
        <module name="ClassFanOutComplexity">
            <property name="max" value="16"/>
        </module>
        <module name="CyclomaticComplexity"/>
        <module name="JavaNCSS">
            <property name="methodMaximum" value="20"/>
            <property name="classMaximum" value="200"/>
            <property name="fileMaximum" value="400"/>
        </module>
        <module name="NPathComplexity"/>

        <!-- Miscellaneous -->
        <module name="ArrayTypeStyle"/>
        <module name="AvoidEscapedUnicodeCharacters"/>
        <module name="CommentsIndentation"/>
        <module name="Indentation"/>
        <module name="OuterTypeFilename"/>
        <module name="TodoComment">
            <property name="format" value="(TODO)|(FIXME)"/>
        </module>
        <module name="TrailingComment"/>
        <module name="UpperEll"/>

        <!-- Modifiers -->
        <module name="ModifierOrder"/>
        <module name="RedundantModifier">
            <property name="tokens"
                      value="METHOD_DEF, ANNOTATION_FIELD_DEF, INTERFACE_DEF, CTOR_DEF, CLASS_DEF, ENUM_DEF"/>
        </module>

        <!-- Naming conventions -->
        <module name="AbbreviationAsWordInName">
            <property name="allowedAbbreviationLength" value="1"/>
        </module>
        <module name="ClassTypeParameterName"/>
        <module name="ConstantName"/>
        <module name="InterfaceTypeParameterName"/>
        <module name="LocalFinalVariableName"/>
        <module name="LocalVariableName"/>
        <module name="MemberName"/>
        <module name="MethodName"/>
        <module name="MethodTypeParameterName"/>
        <module name="PackageName"/>
        <module name="ParameterName"/>
        <module name="StaticVariableName"/>
        <module name="TypeName"/>

        <!-- Size -->
        <module name="AnonInnerLength"/>
        <module name="ExecutableStatementCount"/>
        <module name="LineLength">
            <property name="max" value="120"/>
        </module>
        <module name="MethodCount">
            <property name="maxTotal" value="20"/>
        </module>
        <module name="MethodLength">
            <property name="max" value="20"/>
        </module>
        <module name="OuterTypeNumber"/>
        <module name="ParameterNumber">
            <property name="max" value="4"/>
        </module>

        <!-- Whitespace -->
        <module name="EmptyForInitializerPad"/>
        <module name="EmptyForIteratorPad"/>
        <module name="EmptyLineSeparator">
            <property name="allowMultipleEmptyLines" value="false"/>
        </module>
        <module name="GenericWhitespace"/>
        <module name="MethodParamPad"/>
        <module name="NoLineWrap"/>
        <module name="NoWhitespaceAfter"/>
        <module name="NoWhitespaceBefore"/>
        <module name="OperatorWrap"/>
        <module name="ParenPad"/>
        <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="TypecastParenPad"/>
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround"/>

    </module>
</module>