2 files changed, 13 insertions, 2 deletions
diff --git a/lib/backbone/glossary.js b/lib/backbone/glossary.js
index b25d7c7..0f5e567 100644
--- a/lib/backbone/glossary.js
+++ b/lib/backbone/glossary.js
@@ -7,7 +7,7 @@ A glossary entry is represented by a name and a short description
 An unique id for the entry is generated using its name
 */
 function GlossaryEntry(name, description) {
-    if (!(this instanceof Glossary)) return new Glossary();
+    if (!(this instanceof GlossaryEntry)) return new GlossaryEntry(name, description);
 
     this.name = name;
     this.description = description;
@@ -54,4 +54,9 @@ Glossary.prototype.get = function(id) {
     });
 };
 
+// Return false if glossary has entries (and exists)
+Glossary.prototype.isEmpty = function(id) {
+    return _.size(this.entries) === 0;
+};
+
 module.exports = Glossary;
diff --git a/lib/backbone/summary.js b/lib/backbone/summary.js
index 7eb6e0c..96815a6 100644
--- a/lib/backbone/summary.js
+++ b/lib/backbone/summary.js
@@ -1,8 +1,14 @@
+var util = require('util');
+var BackboneFile = require('./file');
+
 var Article = require('./article');
 
 function Summary() {
-    if (!(this instanceof Summary)) return new Summary();
+    BackboneFile.apply(this, arguments);
+
+    this.articles = [];
 }
+util.inherits(Summary, BackboneFile);
 
 Summary.prototype.type = 'summary';