StoreProcedure in Hibernate with annotation

I am using Hibernate JPA implementation.
Storeprocedure has two IN and One OUT parameter as bellow.

PROCEDURE procName(param1 VARCHAR2, param2 CHAR,result_cursor OUT dual_cursorType)

In Java code calling storeprocedure as bellow.

Pojo.java

public static Collection<xxx> findxxxxx(
EntityManagerUtil emUtil,
String param1,
String param2)
{
Query query = emUtil.getEntityManager().createNativeQuery("{call packageName.procName(?,:param1,:param2)}");
//query.setParameter(0, "");
query.setParameter("param1", param1);
query.setParameter("param2",param2);

return (Collection<xxx>)(query.getResultList());
}

I am getting bellow exception :
java.lang.IllegalArgumentException: org.hibernate.QueryException: Expected positional parameter count: 1, actual parameters: [] [{call packageName.procName(?,:param1,:param2)}]

I am not able to find on forum how to register OUT paramter for storedprocedure.