Get rid of checks when creating constructs. Check should handle this.

text.go

@@ -1,17 +1,14 @@
 package atom
 
-import (
-	"fmt"
-	"html"
-)
+import "html"
 
 type Text interface {
 	isText() bool
 	Check() error
 }
 
-// NewText creates a new Text. It returns a Text and an error.
-func NewText(textType, content string) (Text, error) {
+// NewText creates a new Text. It returns a Text.
+func NewText(textType, content string) Text {
 	switch textType {
 	case "text", "":
 		return newPlainText(textType, content)
@@ -20,6 +17,6 @@ func NewText(textType, content string) (Text, error) {
 	case "xhtml":
 		return newXHTMLText(textType, content)
 	default:
-		return nil, fmt.Errorf("%v is not a valid text type", textType)
+		return nil
 	}
 }