Add EmptyLineSeparator Checkstyle rule

* Support "blank lines around" via `spring-framework.xml` IDEA config
* Fix all the Checkstyle violations

spring-integration-ws/src/test/java/org/springframework/integration/ws/DefaultSoapHeaderMapperTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -222,7 +222,6 @@ public class DefaultSoapHeaderMapperTests {
 		System. out. println(stringResult.toString());*/
 	}
 
-
 	@Test
 	public void testDoNotOverriderSoapAction() throws Exception {
 		MimeHeaders mimeHeaders = new MimeHeaders();

spring-integration-ws/src/test/java/org/springframework/integration/ws/MarshallingWebServiceIntegrationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -110,7 +110,6 @@ public class MarshallingWebServiceIntegrationTests {
 			}
 		}
 
-
 		public boolean supports(Class<?> clazz) {
 			return true;
 		}

spring-integration-ws/src/test/java/org/springframework/integration/ws/SimpleWebServiceInboundGatewayTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -107,7 +107,6 @@ public class SimpleWebServiceInboundGatewayTests {
 				.isThrownBy(() -> gateway.invoke(context));
 	}
 
-
 	private Answer<Boolean> withReplyTo(final MessageChannel replyChannel) {
 		return invocation -> {
 			replyChannel.send((Message<?>) invocation.getArguments()[0]);

spring-integration-ws/src/test/java/org/springframework/integration/ws/SimpleWebServiceOutboundGatewayTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -116,7 +116,6 @@ public class SimpleWebServiceOutboundGatewayTests {
 		assertThat(soapActionFromCallback.get()).isEqualTo("\"" + soapActionHeaderValue + "\"");
 	}
 
-
 	@Test //INT-1029
 	public void testWsOutboundGatewayInsideChain() {
 		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(

spring-integration-ws/src/test/java/org/springframework/integration/ws/WebServiceInboundGatewayJavaConfigTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2022 the original author or authors.
+ * Copyright 2016-2024 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.
@@ -112,7 +112,6 @@ public class WebServiceInboundGatewayJavaConfigTests {
 
 		assertThat(output.toString().endsWith(input)).isTrue();
 
-
 		context = mock(MessageContext.class);
 		request = mock(SoapMessage.class);
 

spring-integration-ws/src/test/java/org/springframework/integration/ws/config/DefaultConfigurationTests.java

@@ -47,7 +47,6 @@ public class DefaultConfigurationTests {
 	@Autowired
 	private ApplicationContext context;
 
-
 	@Test
 	public void verifyErrorChannel() {
 		Object errorChannel = context.getBean("errorChannel");

spring-integration-ws/src/test/java/org/springframework/integration/ws/config/StubMarshallerAndUnmarshaller.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -30,7 +30,6 @@ import org.springframework.oxm.XmlMappingException;
  */
 public class StubMarshallerAndUnmarshaller implements Marshaller, Unmarshaller {
 
-
 	@SuppressWarnings("rawtypes")
 	public boolean supports(Class clazz) {
 		return false;

spring-integration-ws/src/test/java/org/springframework/integration/ws/config/StubUnmarshaller.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -28,7 +28,6 @@ import org.springframework.oxm.XmlMappingException;
  */
 public class StubUnmarshaller implements Unmarshaller {
 
-
 	@SuppressWarnings("rawtypes")
 	public boolean supports(Class clazz) {
 		return false;

spring-integration-ws/src/test/java/org/springframework/integration/ws/config/WebServiceInboundGatewayParserTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -179,7 +179,6 @@ public class WebServiceInboundGatewayParserTests {
 		assertThat(TestUtils.getPropertyValue(replyTimeoutGateway, "messagingTemplate.receiveTimeout")).isEqualTo(1234L);
 	}
 
-
 	@SuppressWarnings("unused")
 	private static class TestHeaderMapper implements SoapHeaderMapper {
 

spring-integration-ws/src/test/java/org/springframework/integration/ws/config/WebServiceOutboundGatewayParserTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -202,7 +202,6 @@ public class WebServiceOutboundGatewayParserTests {
 		assertThat(accessor.getPropertyValue("faultMessageResolver")).isEqualTo(resolver);
 	}
 
-
 	@Test
 	public void simpleGatewayWithCustomMessageSender() {
 		AbstractEndpoint endpoint = this.context.getBean("gatewayWithCustomMessageSender", AbstractEndpoint.class);