spring-authorization-server/etc/checkstyle/suppressions.xml

<?xml version="1.0"?>
<!DOCTYPE suppressions PUBLIC
		"-//Checkstyle//DTD SuppressionFilter Configuration 1.2//EN"
		"https://checkstyle.org/dtds/suppressions_1_2.dtd">
<suppressions>
	<suppress files=".+Application\.java" checks="HideUtilityClassConstructor"/>
	<suppress files=".+Configuration\.java" checks="HideUtilityClassConstructor"/>
	<suppress files="[\\/]BCrypt(Tests)?\.java" checks="RegexpHeader"/>

	<suppress files="[\\/]src[\\/]test[\\/]java[\\/]" checks="Javadoc"/>
	<suppress files="[\\/]src[\\/]integration-test[\\/]java[\\/]" checks="Javadoc"/>

	<suppress files="[\\/]docs[\\/]" checks="Javadoc"/>
	<suppress files="[\\/]docs[\\/]" checks="CommentsIndentation"/>
	<suppress files="[\\/]docs[\\/]" checks="InnerTypeLast"/>

	<suppress files="[\\/]samples[\\/]" checks="Javadoc"/>
	<suppress files="[\\/]samples[\\/]" checks="CommentsIndentation"/>
	<suppress files="[\\/]samples[\\/]" checks="InnerTypeLast"/>
</suppressions>