Catch exceptions

lib/file_document_store.js

@@ -11,12 +11,21 @@ var FileDocumentStore = function(options) {
 
 // Save data in a file, key as md5 - since we don't know what we could be passed here
 FileDocumentStore.prototype.set = function(key, data, callback) {
+  try {
     var _this = this;
     fs.mkdir(this.basePath, '700', function() {
-    fs.writeFile(_this.basePath + '/' + hashlib.md5(key), data, 'utf8', function() {
+      fs.writeFile(_this.basePath + '/' + hashlib.md5(key), data, 'utf8', function(err) {
-      callback(true); // TODO handle errors
+        if (err) {
+          callback(false);
+        }
+        else {
+          callback(true);
+        }
       });
     });
+  } catch(err) {
+    callback(false);
+  }
 };
 
 // Get data from a file from key