diff --git a/lib/archive.js b/lib/archive.js
index 23d443a..5e36069 100644
--- a/lib/archive.js
+++ b/lib/archive.js
@@ -15,11 +15,13 @@ function ArchiveObject(engine) {
     
     this.setReadFormat = function(readFormat) {
         this.readFormat = readFormat;
+        
         return this;
     };
     
     this.setWriteFormat = function(writeFormat) {
         this.writeFormat = writeFormat;
+        
         return this;
     };
     
@@ -96,6 +98,7 @@ function ArchiveObject(engine) {
     
     this.addFile = function(file) {
         this.patterns.push(file);
+        
         return this;
     };
     
@@ -104,6 +107,8 @@ function ArchiveObject(engine) {
         if (typeof engine === "undefined") {
             this.setEngine("cabinet");
         };
+        
+        return this;
     };
     
     this.create();