diff --git a/config-serializer/UhkBuffer.ts b/config-serializer/UhkBuffer.ts
index 66e6d498..56fcf70e 100644
--- a/config-serializer/UhkBuffer.ts
+++ b/config-serializer/UhkBuffer.ts
@@ -4,9 +4,9 @@ class UhkBuffer {
     private static longCompactLengthPrefix = 0xFF;
     private static stringEncoding = 'utf8';
 
-    buffer: Buffer;
-    offset: number;
-    bytesToBacktrack: number;
+    private buffer: Buffer;
+    private offset: number;
+    private bytesToBacktrack: number;
 
     constructor() {
         this.offset = 0;
@@ -129,4 +129,8 @@ class UhkBuffer {
         this.offset -= this.bytesToBacktrack;
         this.bytesToBacktrack = 0;
     }
+
+    getBufferContent(): Buffer {
+        return this.buffer.slice(0, this.offset);
+    }
 }
diff --git a/config-serializer/test-serializer.ts b/config-serializer/test-serializer.ts
index f6061621..49897a17 100644
--- a/config-serializer/test-serializer.ts
+++ b/config-serializer/test-serializer.ts
@@ -5,9 +5,9 @@
 /// <reference path="config-items/config-items.ts" />
 
 let fs = require('fs');
-let writer = new UhkBuffer();
+let buffer = new UhkBuffer();
 let uhkConfig = JSON.parse(fs.readFileSync('uhk-config.json'));
 let keyActions = uhkConfig.keymaps[0].layers[0].modules[0].keyActions;
 let keyActionObjects: KeyActions = new KeyActions().fromJsObject(keyActions);
-keyActionObjects.toBinary(writer);
-fs.writeFileSync('uhk-config.bin', writer.buffer);
+keyActionObjects.toBinary(buffer);
+fs.writeFileSync('uhk-config.bin', buffer.getBufferContent());