DATAGEODE-306 - Edit Javadoc on the GemfireRepository interface.

spring-data-geode/src/main/java/org/springframework/data/gemfire/repository/GemfireRepository.java

@@ -38,6 +38,13 @@ public interface GemfireRepository<T, ID> extends CrudRepository<T, ID> {
 	 */
 	Iterable<T> findAll(Sort sort);
 
+	/**
+	 * Save the entity wrapped by the given {@link Wrapper}.
+	 *
+	 * @param wrapper {@link Wrapper} object wrapping the entity and the identifier of the entity (i.e. key).
+	 * @return the saved entity.
+	 * @see org.springframework.data.gemfire.repository.Wrapper
+	 */
 	T save(Wrapper<T, ID> wrapper);
 
 }