@Column(...)
	@Convert(converter=ConceptConverter.class)
	private Concept concept;

public enum Concept {

	DOCUMENT,
	STATIC_FOLDER,
	DYNAMIC_FOLDER,
	GENERIC_TASK,
	SAP_PRODUCT,
	COMMENT,
	TEXTVAR

}

@Converter
public class ConceptConverter implements AttributeConverter<Concept, String> {

	private static String[] STRINGS = {
		"Document", 
		"Static Folder", 
		"Dynamic Folder", 
		"GenericTask", 
		"SAP Product", 
		"Comment", 
		"Text Variable"
	};

	@Override
	public String convertToDatabaseColumn(Concept val) {
		if (val != null) {
			return STRINGS[val.ordinal()];
		}
		return null;
	}

	@Override
	public Concept convertToEntityAttribute(String val) {
		for (int i = 0; i < STRINGS.length; i++) {
			if (STRINGS[i].equals(val)) {
				return Concept.values()[i];
			}
		}
		return null;
	}
}