Added account_classes migration and model.

app/AccountClass.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace App;
+
+use Illuminate\Database\Eloquent\Model;
+
+class AccountClass extends Model
+{
+    //
+}

database/migrations/2018_09_07_081651_create_account_classes_table.php

@@ -0,0 +1,45 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateAccountClassesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('account_classes', function (Blueprint $table) {
+            $table->increments('id');
+
+            // Name of the account class
+            $table->string('name');
+
+            // The type of the account class.
+            $table->integer('io_type')->unsigned();
+            $table->foreign('io_type')->references('id')->on('io_types')
+                  ->onDelete('no action');
+            
+            // The scope of the account class.
+            $table->integer('scope')->unsigned();
+            $table->foreign('scope')->references('id')->on('scopes')
+                  ->onDelete('no action');
+
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('account_classes');
+    }
+}