* File.separator, the given database-name will be used as default directory
* for the database-file.
*/
public static void open(String database) {
try {
PersistenceEngine engine = (PersistenceEngine) Class.forName(
persistenceEngineClassName).newInstance();
engine.open(database);
odb = new ObjectDatabase(engine);
odb.open();
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);