// Create the checksums directory if it does not yet exist
checksumDir = new File(RunUtil.getContentDir(), CHECKSUM_DIR);
checksumDir.mkdirs();
// Add handlers for each of the different kinds of assets
factoryMap.put(ModuleAssetDescriptor.class, new ModuleChecksumFactory());
factoryMap.put(ContentAssetDescriptor.class, new ContentChecksumFactory());
}