diff --git a/src/Entity/Event.php b/src/Entity/Event.php
index 607a04d..1fd7769 100644
--- a/src/Entity/Event.php
+++ b/src/Entity/Event.php
@@ -15,8 +15,6 @@ class Event
 	 *
 	 * @ORM\Id
 	 * @ORM\Column(type="Uuid", unique=true)
-	 * @ORM\GeneratedValue(strategy="CUSTOM")
-	 * @ORM\CustomIdGenerator(class="Ramsey\Uuid\Doctrine\UuidGenerator")
 	 */
 	protected $id;
 
@@ -31,7 +29,7 @@ class Event
 	/**
 	 * @var string
 	 *
-	 * @ORM\Column(type="string")
+	 * @ORM\Column(type="text")
 	 */
 	protected $description;
 
@@ -41,8 +39,10 @@ class Event
 	 */
 	protected $eventType;
 
-	public function __construct() {
-
+	public function __construct(string $title, EventType $eventType) {
+		$this->id = Uuid::uuid4();
+		$this->title = $title;
+		$this->eventType = $eventType;
 	}
 
 	public function getId(): UuidInterface {
diff --git a/src/Entity/EventType.php b/src/Entity/EventType.php
index 8320c72..ceba819 100644
--- a/src/Entity/EventType.php
+++ b/src/Entity/EventType.php
@@ -25,7 +25,7 @@ class EventType
 
 	/**
 	 * @var string|null
-	 * @ORM\Column(type="text", nullable=true)
+	 * @ORM\Column(type="string", nullable=true, length=512)
 	 */
 	protected $comment;
 
diff --git a/src/Entity/SubEvent.php b/src/Entity/SubEvent.php
index 2ade7b2..dd78ff9 100644
--- a/src/Entity/SubEvent.php
+++ b/src/Entity/SubEvent.php
@@ -15,11 +15,15 @@ class SubEvent
 	 *
 	 * @ORM\Id
 	 * @ORM\Column(type="Uuid", unique=true)
-	 * @ORM\GeneratedValue(strategy="CUSTOM")
-	 * @ORM\CustomIdGenerator(class="Ramsey\Uuid\Doctrine\UuidGenerator")
 	 */
 	protected $id;
 
+	/**
+	 * @var Event
+	 *
+	 * @ORM\ManyToOne(targetEntity="Event")
+	 */
+	protected $parent;
 
 	/**
 	 * @var string
@@ -31,7 +35,7 @@ class SubEvent
 	/**
 	 * @var string
 	 *
-	 * @ORM\Column(type="string")
+	 * @ORM\Column(type="text")
 	 */
 	protected $description;
 
@@ -49,7 +53,9 @@ class SubEvent
 	 */
 	protected $endDate;
 
-	public function __construct(string $title, string $description, \DateTime $startDate, \DateTime $endDate) {
+	public function __construct(Event $parent, string $title, string $description, \DateTime $startDate, \DateTime $endDate) {
+		$this->id = Uuid::uuid4();
+		$this->parent = $parent;
 		$this->title = $title;
 		$this->description = $description;
 		$this->startDate = $startDate;
@@ -60,6 +66,14 @@ public function getId(): UuidInterface {
 		return $this->id;
 	}
 
+	public function getParent(): Event {
+		return $this->parent;
+	}
+
+	public function setParent(Event $parent): void {
+		$this->parent = $parent;
+	}
+
 	public function getTitle(): string {
 		return $this->title;
 	}