code: static void createFeedRegistryIfNotExists(Connection connection) throws SQLException {
          Statement statement = connection.createStatement();
          statement.execute("create table if not exists feeds (namespace varchar primary key, md5 varchar, " +
                                "sha1 varchar, feed_id varchar, feed_version varchar, filename varchar, loaded_date timestamp, " +
                                "snapshot_of varchar)");
      }
docs: Creates the feed registry table if it does not already exist. This must occur before the first attempt to load a
  GTFS feed or create an empty snapshot. Note: the connection MUST be committed after this method call.