I've noticed that ZipFileStore#supportsFileAttributeView(String)
doesn't throw NullPointerException when 'null' is passed as an
argument.

public boolean supportsFileAttributeView(String name) {
    return "basic".equals(name) || "zip".equals(name) ||
           (("owner".equals(name) || "posix".equals(name)) && zfs.supportPosix);
}

Package level javadoc for {{java.nio.file}} package mentions that NullPointerException is expected from all methods which pass {{null}}:

>Unless otherwise noted, passing a null argument to a constructor or method in any class or interface in this package will cause a NullPointerException to be thrown.

Other JDK implementations of FileStore throw NPE in this method in case of null.