ScriptableObjectUtility.cs

using UnityEngine;
using UnityEditor;
using System.IO;

/// <summary>
/// Creates a ScriptableObject based on the T parameter
/// How to use: Simple place it into your Unity project and call CreateAsset when required.
/// </summary>
public static class ScriptableObjectUtility
{
    public static ScriptableObject CreateAsset<T>() where T : ScriptableObject
    {
        T asset = ScriptableObject.CreateInstance<T>();

        string path = AssetDatabase.GetAssetPath(Selection.activeObject);
        if (path == "")
        {
            path = "Assets";
        }
        else if (Path.GetExtension(path) != "")
        {
            path = path.Replace(Path.GetFileName(AssetDatabase.GetAssetPath(Selection.activeObject)), "");
        }
        string assetPathAndName = AssetDatabase.GenerateUniqueAssetPath(path + "/New " + typeof(T).ToString() + ".asset");

        AssetDatabase.CreateAsset(asset, assetPathAndName);

        AssetDatabase.SaveAssets();
        AssetDatabase.Refresh();
        EditorUtility.FocusProjectWindow();
        Selection.activeObject = asset;

        return asset;
    }

    
}