docs: public static Runnable writeTerminusMarker(final String nonce, final NodeSettings paths, final VoltLogger logger) {
          final File f = new File(paths.getVoltDBRoot(), VoltDB.TERMINUS_MARKER);
          return new Runnable() {
              @Override
              public void run() {
                  try(PrintWriter pw = new PrintWriter(new FileWriter(f), true)) {
                      pw.println(nonce);
                  } catch (IOException e) {
                      throw new RuntimeException("Failed to create .complete file for " + f.getName(), e);
                  }
              }
          };
      }