@@ -0,0 +1,188 @@
+package org.gnode.nix;%0A%0A/**%0A * NIX back-end implementations.%0A */%0Apublic class Implementation %7B%0A%0A    /**%0A     * HDF5 back-end implementation%0A     */%0A    public static final int Hdf5 = 0;%0A%7D%0A

add constants for implementation mode