1<?xml version="1.0"?> 2<!DOCTYPE module PUBLIC 3 "-//Puppy Crawl//DTD Check Configuration 1.3//EN" 4 "http://www.puppycrawl.com/dtds/configuration_1_3.dtd"> 5<module name="Checker"> 6 <module name="RegexpHeader"> 7 <property name="fileExtensions" value="java"/> 8 <property name="headerFile" value="${checkstyle.header.file}"/> 9 </module> 10</module> 11