code: public void storeSkipExisting(Entry entry) throws MissingParentException {
          try {
              store(entry);
          } catch (EntryAlreadyExistsException e) {
              LOGGER.debug("Entry already exists. Skipping.");
          }
      }
docs: Inserts an entry into the DIT. If the entry exists, nothing is done. Throws {@link MissingParentException} if an
  ancestor of the entry is missing.