onyx embedded persistence manager factory

Main.java

PersistenceManagerFactory factory = new EmbeddedPersistenceManagerFactory(); //1

factory.setCredentials("username", "password"); //2

String pathToOnyxDB = System.getProperty("user.home") 
                    + File.separatorChar + ".onyxdb" 
                    + File.separatorChar + "sandbox" 
                    + File.separatorChar +"embedded-db.oxd";
factory.setDatabaseLocation(pathToOnyxDB); //3

factory.initialize();  //4

PersistenceManager manager = factory.getPersistenceManager();  //5

For more information see: Embedded Persistence Manager Factory Tutorial