Added more error handling and necessary functions

xhtmlText.go

@@ -1,6 +1,8 @@
 package atom
 
-import "fmt"
+import (
+	"fmt"
+)
 
 type XHTMLText struct {
 	*CommonAttributes
@@ -11,6 +13,19 @@ type XHTMLText struct {
 // isText checks whether the XHTMLText is a Text. It returns a bool.
 func (x *XHTMLText) isText() bool { return true }
 
+// newPlainText creates a new PlainText. It returns a *PlainText and an error.
+func newXHTMLText(textType, content string) (*XHTMLText, error) {
+	xhtmlDiv, err := NewXHTMLDiv(content)
+	if err != nil {
+		return nil, fmt.Errorf("error creating new xhtml text: %v", err)
+	}
+
+	return &XHTMLText{
+		Type:     textType,
+		XHTMLDiv: xhtmlDiv,
+	}, nil
+}
+
 // Check checks the XHTMLText for incompatibilities with RFC4287. It returns an
 // error.
 func (x *XHTMLText) Check() error {