checkstyle.xml

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

<module name="Checker">
    <!--
        If you set the basedir property below, then all reported file
        names will be relative to the specified directory. See
        http://checkstyle.sourceforge.net/5.x/config.html#Checker

        <property name="basedir" value="${basedir}"/>
    -->

    <!-- <property name="fileExtensions" value="java, properties"/> -->
    <property name="fileExtensions" value="java"/>

    <!-- Checks that a package-info.java file exists for each package.     -->
    <!-- See http://checkstyle.sf.net/config_javadoc.html#JavadocPackage -->
    <!-- <module name="JavadocPackage"/> -->

    <!-- Checks whether files end with a new line.                        -->
    <!-- See http://checkstyle.sf.net/config_misc.html#NewlineAtEndOfFile -->
    <!--<module name="NewlineAtEndOfFile"/>-->

    <!-- Checks that property files contain the same keys.         -->
    <!-- See http://checkstyle.sf.net/config_misc.html#Translation -->
    <!--
    <module name="Translation"/>
    -->

    <!-- Checks for Size Violations.                    -->
    <!-- See http://checkstyle.sf.net/config_sizes.html -->
    <!-- <module name="FileLength"/> -->

    <!-- Checks for whitespace                               -->
    <!-- See http://checkstyle.sf.net/config_whitespace.html -->
    <!-- Checks that there are no tab characters ('\t') in the source code.  http://checkstyle.sourceforge.net/config_whitespace.html#FileTabCharacter-->
    <module name="FileTabCharacter"/>

    <!-- Miscellaneous other checks.                   -->
    <!-- See http://checkstyle.sf.net/config_misc.html -->
    <!--
    <module name="RegexpSingleline">
       <property name="format" value="[^\s]\s+$"/>
       <property name="minimum" value="0"/>
       <property name="maximum" value="0"/>
       <property name="message" value="Line has trailing spaces."/>
    </module>
    -->

    <!-- Checks for Headers                                -->
    <!-- See http://checkstyle.sf.net/config_header.html   -->
    <!--
    <module name="RegexpHeader">
        <property name="headerFile" value="${checkstyle.header.file}"/>
        <property name="fileExtensions" value="java"/>
    </module>
    -->

    <module name="TreeWalker">

        <!-- Checks for Javadoc comments.                     -->
        <!-- See http://checkstyle.sf.net/config_javadoc.html -->
        <!--
        <module name="JavadocMethod">
            <property name="severity" value="info"/>
            <property name="allowMissingParamTags" value="true"/>
        </module>
        <module name="JavadocType"/>
        <module name="JavadocVariable">
            <property name="ignoreNamePattern" value="^[A-Z_\-]+$" />
        </module>
        <module name="JavadocStyle">
            <property name="checkFirstSentence" value="false" />
        </module>
        -->

        <!-- Checks for Naming Conventions.                  -->
        <!-- See http://checkstyle.sf.net/config_naming.html -->
        <!--
        <module name="ConstantName"/>
        <module name="LocalFinalVariableName"/>
        <module name="LocalVariableName"/>
        <module name="MemberName"/>
        <module name="MethodName"/>
        <module name="PackageName"/>
        <module name="ParameterName"/>
        <module name="StaticVariableName"/>
        <module name="TypeName"/>
        -->

        <!-- Checks for imports                              -->
        <!-- See http://checkstyle.sf.net/config_import.html -->
        <!--
        <module name="AvoidStarImport">
            <property name="excludes" value="lombok,java.util,org.springframework.web.bind.annotation"/>
        </module>
        -->
        <!-- <module name="IllegalImport"/> --> <!-- defaults to sun.* packages -->
        <!-- <module name="RedundantImport"/> -->
        <!-- <module name="UnusedImports">
            <property name="processJavadoc" value="false"/>
        </module> -->
        <!-- <module name="CustomImportOrder" /> -->

        <!-- Checks for Size Violations.                    -->
        <!-- See http://checkstyle.sf.net/config_sizes.html -->
        <!--
        <module name="LineLength">
            <property name="max" value="120"/>
            <!- ignore lines with javadoc inside ->
            <property name="ignorePattern" value="^ *\* *[^ ]+$"/>
        </module>
        <module name="MethodLength"/>
        <module name="ParameterNumber"/>
        -->

        <!-- Checks for whitespace                               -->
        <!-- See http://checkstyle.sf.net/config_whitespace.html -->
        <!--
        <module name="EmptyForIteratorPad"/>
        <module name="GenericWhitespace"/>
        <module name="MethodParamPad"/>
        <module name="NoWhitespaceAfter"/>
        <module name="NoWhitespaceBefore"/>
        <module name="OperatorWrap"/>
        <module name="ParenPad"/>
        <module name="TypecastParenPad"/>
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround"/>
        -->

        <!-- Modifier Checks                                    -->
        <!-- See http://checkstyle.sf.net/config_modifiers.html -->
        <!--
        <module name="ModifierOrder"/>
        <module name="RedundantModifier"/>
        -->

        <!-- Checks for blocks. You know, those {}'s         -->
        <!-- See http://checkstyle.sf.net/config_blocks.html -->

        <!--<module name="AvoidNestedBlocks"/>-->
        <!--<module name="EmptyBlock"/>-->
        <!-- Put the left curly at the end of the line above, not on the next line. http://checkstyle.sourceforge.net/config_blocks.html#LeftCurly-->
        <module name="LeftCurly"/>
        <!--<module name="NeedBraces"/>-->
        <!--<module name="RightCurly"/>-->


        <!-- Checks for common coding problems               -->
        <!-- See http://checkstyle.sf.net/config_coding.html -->
        <!--
        <module name="AvoidInlineConditionals"/>
        <module name="EmptyStatement"/>
        <module name="EqualsHashCode"/>
        <module name="HiddenField">
            <property name="ignoreConstructorParameter" value="true"/>
            <property name="ignoreSetter" value="true"/>
        </module>
        <module name="IllegalInstantiation"/>
        <module name="InnerAssignment"/>
        <module name="MagicNumber"/>
        <module name="MissingSwitchDefault"/>
        <module name="SimplifyBooleanExpression"/>
        <module name="SimplifyBooleanReturn"/>
        -->

        <!-- Checks for class design                         -->
        <!-- See http://checkstyle.sf.net/config_design.html -->
        <!-- <module name="DesignForExtension"/> -->
        <!-- <module name="FinalClass"/> -->
        <!-- <module name="HideUtilityClassConstructor"/> -->
        <!-- <module name="InterfaceIsType"/> -->
        <!-- <module name="VisibilityModifier"/> -->

        <!-- Miscellaneous other checks.                   -->
        <!-- See http://checkstyle.sf.net/config_misc.html -->
        <!-- <module name="ArrayTypeStyle"/> -->
        <!-- <module name="FinalParameters"/> -->
        <!--
        <module name="TodoComment">
            <property name="severity" value="info"/>
        </module>
        -->
        <!-- <module name="UpperEll"/> -->

    </module>

</module>