void createDatabase( File databaseFile ) throws IOException {
    db = Database.create( databaseFile );
  }
@Test
  public void testCreateDatabase() throws IOException {
    assertNull( data.db );
    data.createDatabase( mdbFile );
    assertNotNull( data.db );
    assertTrue( mdbFile.exists() );

    assertNull( data.table );
    data.truncateTable();
    assertNull( data.table );

    data.closeDatabase();
  }