checkstyle.xml

<?xml version="1.0"?>

<!--
    Checkstyle is highly configurable. Be sure to read the documentation at http://checkstyle.sf.net
 -->

<module name = "Checker">
    <property name="charset" value="UTF-8"/>
    <property name="severity" value="warning"/>
    <property name="fileExtensions" value="java, properties, xml"/>
    <module name="TreeWalker">
        <module name="OuterTypeFilename"/>
        <module name="IllegalTokenText">
            <property name="tokens" value="STRING_LITERAL, CHAR_LITERAL"/>
            <property name="format" value="\\u00(09|0(a|A)|0(c|C)|0(d|D)|22|27|5(C|c))|\\(0(10|11|12|14|15|42|47)|134)"/>
            <property name="message" value="Consider using special escape sequence instead of octal value or Unicode escaped value."/>
        </module>
        <module name="AvoidEscapedUnicodeCharacters">
            <property name="allowEscapesForControlCharacters" value="true"/>
            <property name="allowByTailComment" value="true"/>
            <property name="allowNonPrintableEscapes" value="true"/>
        </module>
        <module name="OneTopLevelClass"/>
        <module name="NoLineWrap"/>
        <module name="EmptyBlock">
            <property name="option" value="TEXT"/>
            <property name="tokens" value="LITERAL_TRY, LITERAL_FINALLY, LITERAL_IF, LITERAL_ELSE, LITERAL_SWITCH"/>
        </module>
        <module name="OneStatementPerLine"/>
        <module name="MissingSwitchDefault"/>
        <module name="NoFinalizer"/>
        <module name="OverloadMethodsDeclarationOrder"/>
        <module name="EmptyCatchBlock">
            <property name="exceptionVariableName" value="expected|ignore"/>
        </module>
        <module name="UpperEll"/>

        <!-- Rules from Sun's Java Style  -->
        <module name="IllegalImport"/>
        <module name="EmptyStatement"/>
        <module name="EqualsHashCode"/>
        <module name="SimplifyBooleanReturn"/>
        <module name="TodoComment">
            <property name="format" value="(TODO !)|(FIXME)"/>
            <message key="todo.match" value="Resolve unexpected comment."/>
        </module>

        <!-- Custom  -->
        <module name="DefaultComesLast">
            <property name="skipIfLastAndSharedWithCase" value="true"/>
        </module>
    </module>
</module>