Added more error handling and necessary functions

xhtmlDiv.go

@@ -2,6 +2,7 @@ package atom
 
 import (
 	"encoding/xml"
+	"errors"
 	"fmt"
 )
 
@@ -11,12 +12,16 @@ type XHTMLDiv struct {
 	Content string   `xml:",innerxml"`
 }
 
-// NewXHTMLDiv creates a new XHTMLDiv. It returns a *XHTMLDiv.
-func NewXHTMLDiv(content string) *XHTMLDiv {
+// NewXHTMLDiv creates a new XHTMLDiv. It returns a *XHTMLDiv and an error.
+func NewXHTMLDiv(content string) (*XHTMLDiv, error) {
+	if content == "" {
+		return nil, errors.New("error creating new xhtml div: content string empty")
+	}
+
 	return &XHTMLDiv{
 		XMLNS:   "http://www.w3.org/1999/xhtml",
 		Content: content,
-	}
+	}, nil
 }
 
 // Check checks the XHTMLDiv for incompatibilities with RFC4287. It returns an