Difficulty creating a new .ozx file with `BufferedZipStore`

[melissalinkert]

Using 0.1.2 and this test code:

import java.util.Arrays;
import dev.zarr.zarrjava.store.BufferedZipStore;
import dev.zarr.zarrjava.v3.Array;
import dev.zarr.zarrjava.v3.ArrayMetadata;
import dev.zarr.zarrjava.v3.DataType;

public class ZipTest {

  public void writeTestZip(String outputPath) throws Exception {
    BufferedZipStore store = new BufferedZipStore(outputPath);
  }

  public static void main(String[] args) throws Exception {
    new ZipTest().writeTestZip(args[0]);
  }
}

and running with java ZipTest test.ozx, I see this exception:

Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.nio.file.Path.resolve(String)" because "newPath" is null
	at dev.zarr.zarrjava.store.FilesystemStore.resolveKeys(FilesystemStore.java:31)
	at dev.zarr.zarrjava.store.FilesystemStore.getSize(FilesystemStore.java:232)
	at dev.zarr.zarrjava.store.StoreHandle.getSize(StoreHandle.java:84)
	at dev.zarr.zarrjava.store.ZipStore.getArchiveComment(ZipStore.java:48)
	at dev.zarr.zarrjava.store.BufferedZipStore.loadBuffer(BufferedZipStore.java:199)
	at dev.zarr.zarrjava.store.BufferedZipStore.<init>(BufferedZipStore.java:57)
	at dev.zarr.zarrjava.store.BufferedZipStore.<init>(BufferedZipStore.java:67)
	at dev.zarr.zarrjava.store.BufferedZipStore.<init>(BufferedZipStore.java:75)
	at dev.zarr.zarrjava.store.BufferedZipStore.<init>(BufferedZipStore.java:83)
	at dev.zarr.zarrjava.store.BufferedZipStore.<init>(BufferedZipStore.java:91)
	at dev.zarr.zarrjava.store.BufferedZipStore.<init>(BufferedZipStore.java:95)
	at ZipTest.writeTestZip(ZipTest.java:12)
	at ZipTest.main(ZipTest.java:16)

Is there an alternate way to open for writing a zip file that doesn't already exist?