diff -u b/core/modules/migrate/src/MigrateEvents.php b/core/modules/migrate/src/MigrateEvents.php
--- b/core/modules/migrate/src/MigrateEvents.php
+++ b/core/modules/migrate/src/MigrateEvents.php
@@ -12,6 +12,8 @@
  *
  * @see \Drupal\migrate\MigrateMapSaveEvent
  * @see \Drupal\migrate\MigrateMapDeleteEvent
+ * @see \Drupal\migrate\MigratePreImportEvent
+ * @see \Drupal\migrate\MigratePostImportEvent
  */
 final class MigrateEvents {
 
@@ -47,2 +49,32 @@
 
+  /**
+   * Name of the event fired when beginning a migration import operation.
+   *
+   * This event allows modules to perform an action whenever a migration import
+   * operation is about to begin. The event listener method receives a
+   * \Drupal\migrate\MigratePreImportEvent instance.
+   *
+   * @Event
+   *
+   * @see \Drupal\migrate\MigratePreImportEvent
+   *
+   * @var string
+   */
+  const PRE_IMPORT = 'migrate.pre_import';
+
+  /**
+   * Name of the event fired when finishing a migration import operation.
+   *
+   * This event allows modules to perform an action whenever a migration import
+   * operation is completing. The event listener method receives a
+   * \Drupal\migrate\MigratePostImportEvent instance.
+   *
+   * @Event
+   *
+   * @see \Drupal\migrate\MigratePreImportEvent
+   *
+   * @var string
+   */
+  const POST_IMPORT = 'migrate.post_import';
+
 }
diff -u b/core/modules/migrate/src/MigrateExecutable.php b/core/modules/migrate/src/MigrateExecutable.php
--- b/core/modules/migrate/src/MigrateExecutable.php
+++ b/core/modules/migrate/src/MigrateExecutable.php
@@ -207,6 +207,9 @@
    * {@inheritdoc}
    */
   public function import() {
+    $this->migration->getEventDispatcher()->dispatch(MigrateEvents::PRE_IMPORT,
+      new MigratePreImportEvent($this->migration));
+
     // Knock off migration if the requirements haven't been met.
     try {
       $this->migration->checkRequirements();
@@ -305,12 +308,9 @@
       }
     }
 
-    /**
-     * @TODO uncomment this
-     */
-    #$this->progressMessage($return);
-
     $this->migration->setMigrationResult($return);
+    $this->migration->getEventDispatcher()->dispatch(MigrateEvents::POST_IMPORT,
+      new MigratePostImportEvent($this->migration));
     return $return;
   }
 
diff -u b/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapEnsureTablesTest.php b/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapEnsureTablesTest.php
--- b/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapEnsureTablesTest.php
+++ b/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapEnsureTablesTest.php
@@ -181,34 +181,34 @@
       ->getMock();
     $database->expects($this->any())
       ->method('schema')
-      ->will($this->returnValue($schema));
+      ->willReturn($schema);
     $migration = $this->getMigration();
     $plugin = $this->getMock('Drupal\migrate\Plugin\MigrateSourceInterface');
     $plugin->expects($this->any())
       ->method('getIds')
-      ->will($this->returnValue(array(
+      ->willReturn(array(
       'source_id_property' => array(
         'type' => 'integer',
       ),
-    )));
+    ));
     $migration->expects($this->any())
       ->method('getSourcePlugin')
-      ->will($this->returnValue($plugin));
+      ->willReturn($plugin);
     $event_dispatcher = $this->getMock('Symfony\Component\EventDispatcher\EventDispatcherInterface');
     $migration->expects($this->any())
       ->method('getEventDispatcher')
-      ->will($this->returnValue($event_dispatcher));
+      ->willReturn($event_dispatcher);
     $plugin = $this->getMock('Drupal\migrate\Plugin\MigrateSourceInterface');
     $plugin->expects($this->any())
       ->method('getIds')
-      ->will($this->returnValue(array(
+      ->willReturn(array(
       'destination_id_property' => array(
         'type' => 'string',
       ),
-    )));
+    ));
     $migration->expects($this->any())
       ->method('getDestinationPlugin')
-      ->will($this->returnValue($plugin));
+      ->willReturn($plugin);
     $map = new TestSqlIdMap($database, array(), 'sql', array(), $migration);
     $map->getDatabase();
   }
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/migrate/src/MigratePostImportEvent.php
@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\migrate\MigratePostImportEvent.
+ */
+
+namespace Drupal\migrate;
+
+use Drupal\migrate\Entity\MigrationInterface;
+use Symfony\Component\EventDispatcher\Event;
+
+/**
+ * Wraps a post-import event for event listeners.
+ */
+class MigratePostImportEvent extends Event {
+
+  /**
+   * Map object.
+   *
+   * @var \Drupal\migrate\Entity\MigrationInterface
+   */
+  protected $migration;
+
+  /**
+   * Constructs a post-import event object.
+   *
+   * @param \Drupal\migrate\Entity\MigrationInterface $migration
+   *  Migration object.
+   */
+  public function __construct(MigrationInterface $migration) {
+    $this->migration = $migration;
+  }
+
+  /**
+   * Gets migration object.
+   *
+   * @return \Drupal\migrate\Entity\MigrationInterface
+   *   The migration object just finishing an import operation.
+   */
+  public function getMigration() {
+    return $this->migration;
+  }
+
+}
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/migrate/src/MigratePreImportEvent.php
@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\migrate\MigratePreImportEvent.
+ */
+
+namespace Drupal\migrate;
+
+use Drupal\migrate\Entity\MigrationInterface;
+use Symfony\Component\EventDispatcher\Event;
+
+/**
+ * Wraps a pre-import event for event listeners.
+ */
+class MigratePreImportEvent extends Event {
+
+  /**
+   * Map object.
+   *
+   * @var \Drupal\migrate\Entity\MigrationInterface
+   */
+  protected $migration;
+
+  /**
+   * Constructs a pre-import event object.
+   *
+   * @param \Drupal\migrate\Entity\MigrationInterface $migration
+   *  Migration object.
+   */
+  public function __construct(MigrationInterface $migration) {
+    $this->migration = $migration;
+  }
+
+  /**
+   * Gets migration object.
+   *
+   * @return \Drupal\migrate\Entity\MigrationInterface
+   *   The migration object about to begin an import operation.
+   */
+  public function getMigration() {
+    return $this->migration;
+  }
+
+}