Add JavadocPackageCheck to checkstyle config

* Add missing `package-info.java`
* Update `checkstyle-suppresion.xml`

See spring-projectsgh-31123

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/graphql/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2012-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Auto-configuration for Spring GraphQL metrics.
+ */
+package org.springframework.boot.actuate.autoconfigure.metrics.graphql;

spring-boot-project/spring-boot-tools/spring-boot-test-support/src/main/java/org/springframework/boot/testsupport/junit/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2012-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Support classes for testing against OS.
+ */
+package org.springframework.boot.testsupport.junit;

src/checkstyle/checkstyle-suppressions.xml

@@ -60,4 +60,10 @@
 	<suppress files="DeprecatedReactiveElasticsearchRestClientProperties\.java" checks="SpringMethodVisibility" />
 	<suppress files="DevToolsR2dbcAutoConfigurationTests" checks="HideUtilityClassConstructor" />
 	<suppress files="AbstractLaunchScriptIntegrationTests" checks="IllegalImport" />
+	<suppress files="SpringBootVersion" checks="JavadocPackageCheck" />
+	<suppress files="[\\/]spring-boot-deployment-tests[\\/]" checks="JavadocPackageCheck" />
+	<suppress files="[\\/]spring-boot-smoke-tests[\\/]" checks="JavadocPackageCheck" />
+	<suppress files="[\\/]spring-boot-docs[\\/]" checks="JavadocPackageCheck" />
+	<suppress files="[\\/]spring-boot-system-tests[\\/]" checks="JavadocPackageCheck" />
+	<suppress files="[\\/]src[\\/]intTest[\\/]java[\\/]" checks="JavadocPackageCheck" />
 </suppressions>

src/checkstyle/checkstyle.xml

@@ -58,4 +58,5 @@
 			<property name="requireSinceTag" value="true" />
 		</module>
 	</module>
+	<module name="com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocPackageCheck"/>
 </module>