Paper/paper-api/.checkstyle/checkstyle.xml

<!DOCTYPE module PUBLIC
    "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
    "https://checkstyle.org/dtds/configuration_1_3.dtd">
<module name="Checker">
    <!--Single Suppression Filters-->
    <module name="io.papermc.checkstyle.filters.BetterSuppressionSingleFilter">
        <property name="checks" value="Javadoc(Method|Type)"/>
        <property name="messageKey" value="javadoc\.unknownTag"/>
        <!--[A-Z].* check is for java annotations inside code blocks inside Javadocs-->
        <property name="arguments" value="(${custom_javadoc_tags}|[A-Z].*)"/>
    </module>
    <module name="TreeWalker">
        <!--Skip generated content by typewriter-->
        <module name="SuppressionCommentFilter">
            <property name="offCommentFormat" value="Start generate - \w+$"/>
            <property name="onCommentFormat" value="End generate - \w+$"/>
        </module>
        <module name="JavadocVariable">
            <!--requires on public fields-->
            <property name="accessModifiers" value="public"/>
        </module>
        <module name="MissingJavadocMethod">
            <property name="allowedAnnotations" value="Override, ApiStatus.Internal"/>
            <property name="ignoreMethodNamesRegex" value="^getHandlerList$"/>
        </module>
        <module name="MissingJavadocPackage"/>
        <module name="MissingJavadocType">
            <property name="skipAnnotations" value="Generated, ApiStatus.Internal"/>
        </module>
    </module>
</module>