@Test
 public void addRecords() throws StorageException {
   for (int r = 0; r < numRows; r++) {
     int numCols = 10;
     List<Entry> entries = new ArrayList<Entry>();
     for (int c = 0; c < numCols; c++) {
       entries.add(
           new StaticBufferEntry(
               KeyValueStoreUtil.getBuffer(c + 1), KeyValueStoreUtil.getBuffer(c + r + 2)));
     }
     store.mutate(
         KeyValueStoreUtil.getBuffer(r + 1), entries, KeyColumnValueStore.NO_DELETIONS, tx);
   }
   tx.commit();
   tx = null;
 }
 public void close() throws StorageException {
   if (tx != null) tx.commit();
   store.close();
   manager.close();
 }