diff --git a/draw2dpdf/fileutil.go b/draw2dpdf/fileutil.go
index c3c8e66..349545d 100644
--- a/draw2dpdf/fileutil.go
+++ b/draw2dpdf/fileutil.go
@@ -1,3 +1,6 @@
+// Copyright 2015 The draw2d Authors. All rights reserved.
+// created: 26/06/2015 by Stani Michiels
+
 package draw2dpdf
 
 import "github.com/jung-kurt/gofpdf"
diff --git a/draw2dpdf/gc.go b/draw2dpdf/gc.go
index 8c7c3aa..e1844fb 100644
--- a/draw2dpdf/gc.go
+++ b/draw2dpdf/gc.go
@@ -1,6 +1,6 @@
 // Copyright 2015 The draw2d Authors. All rights reserved.
 // created: 26/06/2015 by Stani Michiels
-// TODO: fonts, dpi
+// TODO: dashed line
 
 package draw2dpdf
 
@@ -88,7 +88,7 @@ func NewGraphicContext(pdf *gofpdf.Fpdf) *GraphicContext {
 // TODO: add type (tp) as parameter to argument list?
 func (gc *GraphicContext) DrawImage(image image.Image) {
 	name := strconv.Itoa(int(imageCount))
-	imageCount += 1
+	imageCount++
 	tp := "PNG" // "JPG", "JPEG", "PNG" and "GIF"
 	b := &bytes.Buffer{}
 	png.Encode(b, image)
diff --git a/draw2dpdf/samples_test.go b/draw2dpdf/samples_test.go
index ac6a4ce..8da8b8d 100644
--- a/draw2dpdf/samples_test.go
+++ b/draw2dpdf/samples_test.go
@@ -1,3 +1,5 @@
+// Copyright 2015 The draw2d Authors. All rights reserved.
+// created: 26/06/2015 by Stani Michiels
 // See also test_test.go
 
 package draw2dpdf_test
diff --git a/draw2dpdf/test_test.go b/draw2dpdf/test_test.go
index 88e1f43..801ff36 100644
--- a/draw2dpdf/test_test.go
+++ b/draw2dpdf/test_test.go
@@ -1,3 +1,6 @@
+// Copyright 2015 The draw2d Authors. All rights reserved.
+// created: 26/06/2015 by Stani Michiels
+
 // Package draw2dpdf_test gives test coverage with the command:
 // go test -cover ./... | grep -v "no test"
 // (It should be run from its parent draw2d directory.)