Create new factory function

* CreateVehicleFactory function initiate a new factory of
	  Car or Motorbike

creational/abstract_factory.md

@@ -0,0 +1,14 @@
+# Abstract Factory Pattern
+
+## Implementation
+
+```go
+```
+
+## Usage
+
+
+```go
+```
+
+## Rules of Thumb

creational/abstract_factory/abstract_factory.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+)
+
+const (
+	CAR  = 1
+	BIKE = 2
+)
+
+func CreateVehicleFactory(v int) (VehicleFactory, error) {
+	switch v {
+	case CAR:
+		return new(CarFactory), nil
+	case BIKE:
+		return new(MotorbikeFactory), nil
+	default:
+		return nil, errors.New(fmt.Sprintf("Factory of type %d not exist\n", v))
+	}
+}