wfstyle.xml

<!DOCTYPE module PUBLIC
    "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
    "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
<module name="Checker">
  <module name="TreeWalker">
    <module name="RegexpSinglelineJava">
      <property name="format" value="YearMonthDay"/>
      <property name="ignoreComments" value="true"/>
      <property name="message" value="Always use LocalDate instead of YearMonthDay."/>
    </module>
  </module>
</module>