spring-authorization-server/etc/checkstyle/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=".*" checks="JavadocStyle" />
	<suppress files="[\\/]src[\\/]test[\\/]" checks="RegexpSinglelineJava" id="toLowerCaseWithoutLocale"/>
	<suppress files="[\\/]src[\\/]test[\\/]" checks="RegexpSinglelineJava" id="toUpperCaseWithoutLocale"/>
	<suppress files="AbstractOAuth2AuthorizationCodeRequestAuthenticationToken\.java" checks="SpringMethodVisibility"/>
</suppressions>