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">

    <!-- Trailing spaces -->
    <module name="RegexpSingleline">
        <property name="format" value="\s+$"/>
        <property name="message" value="Line has trailing spaces."/>
    </module>

    <!-- Checks for the new line format -->
    <module name="RegexpMultiline">
        <property name="format" value="\r\n"/>
        <property name="message" value="Do not use Windows line endings"/>
    </module>

    <module name="TreeWalker">
        <module name="RegexpSinglelineJava">
            <property name="tabWidth" value="4"/>
            <property name="ignoreComments" value="true"/>
        </module>

        <!-- Checks for imports                              -->
        <!-- See http://checkstyle.sf.net/config_import.html -->
        <module name="IllegalImport"> <!-- defaults to sun.* packages -->
            <property name="illegalPkgs" value="sun.*, edu.emory.*"/> <!-- sun? -->
        </module>
        <module name="RedundantImport"/>
        <module name="UnusedImports">
            <property name="processJavadoc" value="true"/>
        </module>

        <!-- Checks for blocks. You know, those {}'s         -->
        <!-- See http://checkstyle.sf.net/config_blocks.html -->
        <module name="LeftCurly" />
        <module name="RightCurly" />
        <module name="NeedBraces"/>
    </module>
</module>