Refine the template to fix excessive newlines

types.go

@@ -1,10 +1,16 @@
 package main
 
+import (
+	"fmt"
+	"os"
+)
+
 type (
 	Class struct {
-		ClassName string
-		Fields    []Field
-		Methods   []Method
+		ClassName    string
+		Fields       []Field
+		Methods      []Method
+		Constructors []Constructor
 	}
 	Field struct {
 		Name    string
@@ -26,4 +32,20 @@ type (
 		Type    string
 		Comment string
 	}
+	Constructor struct {
+		Params  []Param
+		Comment string
+	}
 )
+
+func (c *Class) GetOutFile() (*os.File, error) {
+	if c.ClassName == "" {
+		return nil, fmt.Errorf("ClassName is empty")
+	}
+	filename := fmt.Sprintf("%s.lua", c.ClassName)
+	f, err := os.Create(filename)
+	if err != nil {
+		return nil, err
+	}
+	return f, nil
+}