checkstyle.xml

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

<module name="Checker">

    <!-- Line length check goes here -->
    <module name="LineLength">
        <property name="max" value="120"/>
    </module>

    <module name="TreeWalker">

        <!-- Indentation -->
        <module name="Indentation">
            <property name="basicOffset" value="4"/>
            <property name="tabWidth" value="4"/>
        </module>

        <!-- Basic style checks -->
        <module name="NeedBraces"/>
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround"/>
        <module name="EmptyBlock"/>
        <module name="LeftCurly"/>
        <module name="RightCurly"/>

    </module>
</module>