spring-security-samples/config/checkstyle/suppressions.xml

<?xml version="1.0"?>
<!DOCTYPE suppressions PUBLIC "-//Puppy Crawl//DTD Suppressions 1.1//EN"
		"https://www.puppycrawl.com/dtds/suppressions_1_1.dtd">
<suppressions>
	<!-- OpenSamlActionTestingSupport is copied from Open SAML source -->
	<suppress files="servlet/spring-boot/java/saml2-login/src/integTest/java/example/OpenSamlActionTestingSupport.java" checks=".*"/>
	<!-- Saml2Utils is copied from Open SAML source -->
	<suppress files="servlet/spring-boot/java/saml2-login/src/integTest/java/example/Saml2Utils.java" checks=".*"/>
</suppressions>