docs: private void postProcess() throws SQLException {
          LOGGER.info("Post-processing...");
  
          this.conn = DriverManager.getConnection("jdbc:sqlite:" + this.configuration.getOutputFile().getAbsolutePath());
          this.conn.createStatement().execute(DbConstants.DROP_NODES_STATEMENT);
          this.conn.createStatement().execute(DbConstants.DROP_WAYNODES_STATEMENT);
          this.conn.close();
  
          this.conn = DriverManager.getConnection("jdbc:sqlite:" + this.configuration.getOutputFile().getAbsolutePath());
          this.conn.createStatement().execute("VACUUM;");
          this.conn.close();
      }