리소스 관리 구조 및 쿼리 생성

classDiagram
		JdbcCoordinator <|-- JdbcCoordinatorImpl
		JdbcCoordinatorImpl --* JdbcServices : Composition
		JdbcCoordinatorImpl --* StatementPreparer : Composition
		JdbcCoordinatorImpl --* ResultSetReturn : Composition
		StatementPreparer .. ResourceRegistry : call register

class StatementPreparer{
    Statement createStatement()
}

class ResourceRegistry{
		HashMap~Statement, HashMap[ResultSet,Object]~ xref
		void register(Statement statement, boolean cancelable);
}