Ensure all files end with a newline

Update all files to ensure that they always end with a new line.

Issue: SPR-16968

spring-websocket/src/main/java/org/springframework/web/socket/config/annotation/StompEndpointRegistry.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -52,4 +52,4 @@ public interface StompEndpointRegistry {
 	 */
 	WebMvcStompEndpointRegistry setErrorHandler(StompSubProtocolErrorHandler errorHandler);
 
-}
+}

spring-websocket/src/main/java/org/springframework/web/socket/config/annotation/StompWebSocketEndpointRegistration.java

@@ -61,4 +61,4 @@ public interface StompWebSocketEndpointRegistration {
 	 */
 	StompWebSocketEndpointRegistration setAllowedOrigins(String... origins);
 
-}
+}

spring-websocket/src/main/java/org/springframework/web/socket/config/annotation/WebSocketHandlerRegistration.java

@@ -70,4 +70,4 @@ public interface WebSocketHandlerRegistration {
 
 
 
-}
+}

spring-websocket/src/main/java/org/springframework/web/socket/config/annotation/WebSocketHandlerRegistry.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -31,4 +31,4 @@ public interface WebSocketHandlerRegistry {
 	 */
 	WebSocketHandlerRegistration addHandler(WebSocketHandler webSocketHandler, String... paths);
 
-}
+}

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/client/XhrClientSockJsSession.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -123,4 +123,4 @@ public class XhrClientSockJsSession extends AbstractClientSockJsSession {
 		// Nothing to do: XHR transports check if session is disconnected.
 	}
 
-}
+}