Fix Javadoc.

Fix invalid links. Replace Javadoc links to JSR-305 with code annotations.

Replace self-enclosing tags with simple ones.

See #2423

src/main/java/org/springframework/data/domain/Sort.java

@@ -402,7 +402,7 @@ public class Sort implements Streamable<org.springframework.data.domain.Sort.Ord
 		 *
 		 * @param direction can be {@literal null}, will default to {@link Sort#DEFAULT_DIRECTION}
 		 * @param property must not be {@literal null} or empty.
-		 * @param nullHandling must not be {@literal null}.
+		 * @param nullHandlingHint must not be {@literal null}.
 		 */
 		public Order(@Nullable Direction direction, String property, NullHandling nullHandlingHint) {
 			this(direction, property, DEFAULT_IGNORE_CASE, nullHandlingHint);

src/main/java/org/springframework/data/domain/jaxb/SpringDataJaxb.java

@@ -108,7 +108,6 @@ public abstract class SpringDataJaxb {
 	 * @param source
 	 * @param adapter must not be {@literal null}.
 	 * @return
-	 * @throws Exception
 	 */
 	public static <T, S> List<T> unmarshal(Collection<S> source, XmlAdapter<S, T> adapter) {
 
@@ -136,7 +135,6 @@ public abstract class SpringDataJaxb {
 	 * @param source
 	 * @param adapter must not be {@literal null}.
 	 * @return
-	 * @throws Exception
 	 */
 	public static <T, S> List<S> marshal(@Nullable Iterable<T> source, XmlAdapter<S, T> adapter) {