simple file backed Map for java.
On the interface it works like a Map, on the back end it persists all data to a file.
Example:
File my_file = new File("mydatafile.vl");
VoileMap<String, String> vm = new VoileMap<String,String>(my_file);
vm.get(...); // get items that were stored in previous runs
vm.put(..., ...); // add new items
vm.remove(...); // and remove