<?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">

    <!-- TreeWalker Checks -->
    <module name="TreeWalker">

        <!-- Imports -->
        <module name="UnusedImports">
            <property name="processJavadoc" value="true" />
        </module>

    </module>
</module>

<?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">

    <!-- TreeWalker Checks -->
    <module name="TreeWalker">

        <!-- Imports -->
        <module name="IllegalImportCheck" >
            <property name="illegalPkgs" value="com.google.common.(?!cache).*"/>
            <property name="regexp" value="true"/>
        </module>
        <module name="UnusedImports">
            <property name="processJavadoc" value="true" />
        </module>

    </module>
</module>

Add IllegalImportCheck Checkstyle module against Guava
Add IllegalImportCheck Checkstyle module against Guava
