codestyle/checkstyle_unix.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">
    <module name="NewlineAtEndOfFile">
        <property name="lineSeparator" value="lf" />
    </module>
</module>