Polishing.

Add missing override annotations.

See #2508

src/main/java/org/springframework/data/convert/DefaultTypeMapper.java

@@ -112,6 +112,7 @@ public class DefaultTypeMapper<S> implements TypeMapper<S>, BeanClassLoaderAware
 	 * @see org.springframework.data.convert.TypeMapper#readType(java.lang.Object)
 	 */
 	@Nullable
+	@Override
 	public TypeInformation<?> readType(S source) {
 
 		Assert.notNull(source, "Source object must not be null!");
@@ -142,6 +143,7 @@ public class DefaultTypeMapper<S> implements TypeMapper<S>, BeanClassLoaderAware
 	 * (non-Javadoc)
 	 * @see org.springframework.data.convert.TypeMapper#readType(java.lang.Object, org.springframework.data.util.TypeInformation)
 	 */
+	@Override
 	public <T> TypeInformation<? extends T> readType(S source, TypeInformation<T> basicType) {
 
 		Assert.notNull(source, "Source must not be null!");
@@ -198,6 +200,7 @@ public class DefaultTypeMapper<S> implements TypeMapper<S>, BeanClassLoaderAware
 	 * (non-Javadoc)
 	 * @see org.springframework.data.convert.TypeMapper#writeType(java.lang.Class, java.lang.Object)
 	 */
+	@Override
 	public void writeType(Class<?> type, S dbObject) {
 		writeType(ClassTypeInformation.from(type), dbObject);
 	}
@@ -206,6 +209,7 @@ public class DefaultTypeMapper<S> implements TypeMapper<S>, BeanClassLoaderAware
 	 * (non-Javadoc)
 	 * @see org.springframework.data.convert.TypeMapper#writeType(org.springframework.data.util.TypeInformation, java.lang.Object)
 	 */
+	@Override
 	public void writeType(TypeInformation<?> info, S sink) {
 
 		Assert.notNull(info, "TypeInformation must not be null!");

src/main/java/org/springframework/data/convert/SimpleTypeInformationMapper.java

@@ -69,6 +69,7 @@ public class SimpleTypeInformationMapper implements TypeInformationMapper, BeanC
 	 * @param type must not be {@literal null}.
 	 * @return the String representation to be stored or {@literal null} if no type information shall be stored.
 	 */
+	@Override
 	public Alias createAliasFor(TypeInformation<?> type) {
 		return Alias.of(type.getType().getName());
 	}