@Test(expectedExceptions = IllegalArgumentException.class,expectedExceptionsMessageRegExp = ".*No converter.*")
public void unknownOpenType() throws OpenDataException {

    converter.convertToObject(new OpenType("java.util.Date","guenther","guenther") {
        @Override
        public boolean isValue(Object obj) {
            return false;
        }
        @Override
        public boolean equals(Object obj) {
            return false;
        }
        @Override
        public int hashCode() {
            return 0;
        }
        @Override
        public String toString() {
            return null;
        }
    },"bla");
}