@Override
    public FileReference addBlob(String name, ByteBuffer blob) {
        String relativePath = "./" + name;
        FileReference fileReference = new FileReference(relativePath);
        entries.add(new Entry(relativePath, fileReference));
        return fileReference;
    }
A file registry for testing, and, it seems, doubling as a null registry in some code paths.

@author Tony Vaagenes
@author hmusum
config-application-package/src/main/java/com/yahoo/config/model/application/provider/MockFileRegistry.java