add exceptions

src/Exception/DriverException.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Pulsar\Exception;
+
+use Exception;
+
+class DriverException
+{
+    /**
+     * @var Exception
+     */
+    private $exception;
+
+    /**
+     * Sets the underlying exception.
+     *
+     * @param Exception $e
+     */
+    public function setException(Exception $e)
+    {
+        $this->exception = $e;
+    }
+
+    /**
+     * Gets the underlying exception.
+     *
+     * @return Exception
+     */
+    public function getException()
+    {
+        return $this->exception;
+    }
+}

src/Exception/NotFoundException.php

@@ -0,0 +1,17 @@
+<?php
+
+/**
+ * @author Jared King <j@jaredtking.com>
+ *
+ * @link http://jaredtking.com
+ *
+ * @copyright 2015 Jared King
+ * @license MIT
+ */
+namespace Pulsar\Exception;
+
+use Exception;
+
+class NotFoundException extends Exception
+{
+}

tests/Exception/DriverExceptionTest.php

@@ -0,0 +1,14 @@
+<?php
+
+use Pulsar\Exception\DriverException;
+
+class DriverExceptionTest extends PHPUnit_Framework_TestCase
+{
+    public function testException()
+    {
+        $e = new Exception();
+        $ex = new DriverException();
+        $ex->setException($e);
+        $this->assertEquals($e, $ex->getException());
+    }
+}