Fixing checkstyle errors

Author: ryanjbaxter

specs/spring-cloud-contract-spec-java/src/main/java/org/springframework/cloud/contract/spec/internal/Input.java

@@ -225,7 +225,7 @@ public String toString() {
 				+ super.toString();
 	}
 
-	private class ClientPatternValueDslProperty extends PatternValueDslProperty<ClientDslProperty> {
+	private static final class ClientPatternValueDslProperty extends PatternValueDslProperty<ClientDslProperty> {
 
 		@Override
 		protected ClientDslProperty createProperty(Pattern pattern, Object generatedValue) {

specs/spring-cloud-contract-spec-java/src/main/java/org/springframework/cloud/contract/spec/internal/OutputMessage.java

@@ -331,7 +331,7 @@ public String toString() {
 				+ ", \n\tassertThat=" + assertThat + ", \n\tbodyMatchers=" + bodyMatchers + "} \n\t" + super.toString();
 	}
 
-	private class ServerPatternValueDslProperty extends PatternValueDslProperty<ServerDslProperty> {
+	private static final class ServerPatternValueDslProperty extends PatternValueDslProperty<ServerDslProperty> {
 
 		@Override
 		protected ServerDslProperty createProperty(Pattern pattern, Object generatedValue) {

specs/spring-cloud-contract-spec-java/src/main/java/org/springframework/cloud/contract/spec/internal/Request.java

@@ -786,7 +786,7 @@ private class ClientRequest extends Request {
 
 	}
 
-	private class ClientPatternValueDslProperty extends PatternValueDslProperty<ClientDslProperty> {
+	private static final class ClientPatternValueDslProperty extends PatternValueDslProperty<ClientDslProperty> {
 
 		@Override
 		protected ClientDslProperty createProperty(Pattern pattern, Object generatedValue) {

specs/spring-cloud-contract-spec-java/src/main/java/org/springframework/cloud/contract/spec/internal/Response.java

@@ -778,7 +778,7 @@ private class ClientResponse extends Response {
 
 	}
 
-	private class ServerPatternValueDslProperty extends PatternValueDslProperty<ServerDslProperty> {
+	private static final class ServerPatternValueDslProperty extends PatternValueDslProperty<ServerDslProperty> {
 
 		@Override
 		protected ServerDslProperty createProperty(Pattern pattern, Object generatedValue) {

spring-cloud-contract-verifier/src/main/java/org/springframework/cloud/contract/verifier/config/ContractVerifierConfigProperties.java

@@ -149,11 +149,11 @@ public class ContractVerifierConfigProperties {
 	 * A way to override any base class mappings. The keys are regular expressions on the
 	 * package name of the contract and the values FQN to a base class for that given
 	 * expression.
-	 * </p>
+	 *
 	 * Example of a mapping
-	 * </p>
+	 *
 	 * {@code .*.com.example.v1..*} -> {@code com.example.SomeBaseClass}
-	 * </p>
+	 *
 	 * When a contract's package matches the provided regular expression then extending
 	 * class will be the one provided in the map - in this case
 	 * {@code com.example.SomeBaseClass}

spring-cloud-contract-verifier/src/main/java/org/springframework/cloud/contract/verifier/util/NamesUtil.java

@@ -186,7 +186,7 @@ public static String convertIllegalMethodNameChars(String methodName) {
 		return result.replaceAll("[^a-zA-Z_$0-9]", "_");
 	}
 
-	private static class InvalidFolderRenamer extends SimpleFileVisitor<Path> {
+	private static final class InvalidFolderRenamer extends SimpleFileVisitor<Path> {
 
 		private final Deque<FileAndNewName> filesToRename = new ArrayDeque<FileAndNewName>();
 

spring-cloud-contract-verifier/src/test/java/org/springframework/cloud/contract/verifier/messaging/boot/AutoConfigureMessageVerifierTests.java

@@ -50,7 +50,7 @@ public void shouldConfigureForNoOpWhenMissingImplementation() {
 	}
 
 	@AutoConfigureMessageVerifier
-	private static class Configuration {
+	private static final class Configuration {
 
 	}
 

spring-cloud-contract-wiremock/src/main/java/org/springframework/cloud/contract/wiremock/WireMockRestServiceServer.java

@@ -405,7 +405,7 @@ private MediaType contentType(ResponseDefinition response) {
 		return value == null ? MediaType.TEXT_PLAIN : MediaType.valueOf(value);
 	}
 
-	private static class StubMappingComparator implements Comparator<StubMapping> {
+	private static final class StubMappingComparator implements Comparator<StubMapping> {
 
 		@Override
 		public int compare(StubMapping one, StubMapping two) {