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">

    <property name="cacheFile" value="${checkstyle.cache.file}"/>

    <module name="FileTabCharacter">
        <property name="eachLine" value="true"/>
    </module>

    <module name="RegexpSingleline">
        <!-- \s matches whitespace character, $ matches end of line. -->
        <property name="format" value="\s+$"/>
        <property name="message" value="Line has trailing spaces."/>
    </module>

    <module name="TreeWalker">

        <!-- Checks for imports                              -->
        <module name="AvoidStarImport">
            <property name="allowStaticMemberImports" value="true"/>
        </module>
        <module name="RedundantImport"/>

        <module name="UnusedImports">
            <property name="processJavadoc" value="true"/>
        </module>

        <module name="IllegalImport">
            <property name="illegalPkgs" value="junit.framework"/>
        </module>

        <!-- Modifier Checks                                    -->
        <module name="ModifierOrder"/>
        <!-- Too many errors reported since Checkstyle upgrade to > 6.2 -->
        <module name="RedundantModifier">
            <property name="tokens" value="ANNOTATION_FIELD_DEF"/>
        </module>

        <!-- Checks for blocks. You know, those {}'s         -->
        <module name="LeftCurly">
            <property name="option" value="eol"/>
            <property name="tokens" value="CLASS_DEF,CTOR_DEF,INTERFACE_DEF,METHOD_DEF,LITERAL_SWITCH,STATIC_INIT"/>
        </module>

        <!-- Checks for common coding problems               -->
        <!-- Disabled until http://sourceforge.net/tracker/?func=detail&aid=2843447&group_id=29721&atid=397078 is fixed-->
        <!--<module name="DoubleCheckedLocking"/>-->
        <module name="EmptyStatement"/>
        <module name="IllegalInstantiation"/>
        <!-- removed in checkstyle 6.2, see https://github.com/checkstyle/checkstyle/issues/473 -->
        <!--module name="RedundantThrows">
            <property name="allowUnchecked" value="true"/>
            <property name="suppressLoadErrors" value="true"/>
        </module-->

        <!-- Miscellaneous other checks.                   -->
        <module name="UpperEll"/>
        <module name="PackageAnnotation"/>
        <!-- This check doesn't actually work correctly if the overloaded equals is an abstract method on a base class -->
        <!-- <module name="CovariantEquals"/> -->
        <module name="ArrayTypeStyle"/>

        <!-- This is required for SuppressWarningsFilter to work. -->
        <module name="SuppressWarningsHolder"/>

        <!-- Disallow @SuppressWarnings("all") -->
        <module name="SuppressWarnings">
            <property name="format" value="^all$"/>
        </module>
    </module>

    <module name="SuppressionFilter">
        <property name="file" value="/wildfly-checkstyle/suppressions.xml"/>
    </module>

    <!-- Suppress checkstyle warnings in annotations with syntax @SuppressWarnings("checkstyle:lowercasemodulename") -->
    <module name="SuppressWarningsFilter"/>

</module>