Fix checkstyle

spring-boot/src/main/java/org/springframework/boot/LoggedExceptionHandler.java

@@ -72,6 +72,8 @@ class LoggedExceptionHandler implements UncaughtExceptionHandler {
 	/**
 	 * Check if the exception is a log configuration message, i.e. the log call might not
 	 * have actually output anything.
+	 * @param ex the source exception
+	 * @return {@code true} if the exception contains a log configuration message
 	 */
 	private boolean isLogConfigurationMessage(Throwable ex) {
 		String message = ex.getMessage();