<!-- Non-inner classes must be in files that match their names. -->
    <module name="OuterTypeFilename" />

    <!-- No line wraps inside of import and package statements. -->
    <module name="NoLineWrap" />

    <!-- only one statement per line should be allowed -->
    <module name="OneStatementPerLine" />

    <!-- Each java file has only one outer class -->
    <module name="OneTopLevelClass" />