Move exception class files into correct directory according to namespace

Civi/Twingle/Exceptions/BaseException.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace Civi\Twingle\Exceptions;
+
+use CRM_Twingle_ExtensionUtil as E;
+
+/**
+ * A simple custom exception class that indicates a problem within a class
+ * of the Twingle API extension.
+ */
+class BaseException extends \Exception {
+
+  /**
+   * @var int|string
+   */
+  protected $code;
+  protected string $log_message;
+
+  /**
+   * BaseException Constructor
+   * @param string $message
+   *  Error message
+   * @param string $error_code
+   *  A meaningful error code
+   */
+  public function __construct(string $message = '', string $error_code = '') {
+    parent::__construct($message, 1);
+    $this->log_message = !empty($message) ? E::LONG_NAME . ': ' . $message : '';
+    $this->code = $error_code;
+  }
+
+  /**
+   * Returns the error message, but with the extension name prefixed.
+   * @return string
+   */
+  public function getLogMessage() {
+    return $this->log_message;
+  }
+
+  /**
+   * Returns the error code.
+   * @return string
+   */
+  public function getErrorCode() {
+    return $this->code;
+  }
+
+}