diff --git a/db/devicemapper.php b/db/devicemapper.php
index ac36044..9995553 100644
--- a/db/devicemapper.php
+++ b/db/devicemapper.php
@@ -11,8 +11,10 @@ public function __construct(IDBConnection $db) {
 	}
 
 	/**
+	 * @param string $hash
 	 * @throws \OCP\AppFramework\Db\DoesNotExistException if not found
 	 * @throws \OCP\AppFramework\Db\MultipleObjectsReturnedException if more than one result
+	 * @return Device
 	 */
 	public function findByHash($hash) {
 		$sql = 'SELECT * FROM `*PREFIX*maps_location_track_users` '.
@@ -21,8 +23,10 @@ public function findByHash($hash) {
 	}
 
 	/**
+	 * @param int $id
 	 * @throws \OCP\AppFramework\Db\DoesNotExistException if not found
 	 * @throws \OCP\AppFramework\Db\MultipleObjectsReturnedException if more than one result
+	 * @return Device
 	 */
 	public function findById($id) {
 		$sql = 'SELECT * FROM `*PREFIX*maps_location_track_users` '.
@@ -30,6 +34,12 @@ public function findById($id) {
 		return $this->findEntity($sql, [$id]);
 	}
 
+	/**
+	 * @param string $userId
+	 * @param int $limit
+	 * @param int $offset
+	 * @return Device[]
+	 */
 	public function findAll($userId, $limit=null, $offset=null) {
 		$sql = 'SELECT * FROM `*PREFIX*maps_location_track_users`'.
 			'WHERE `user_id` = ?';
diff --git a/db/locationmapper.php b/db/locationmapper.php
index d43e0f1..7ac1493 100644
--- a/db/locationmapper.php
+++ b/db/locationmapper.php
@@ -11,8 +11,10 @@ public function __construct(IDBConnection $db) {
 	}
 
 	/**
+	 * @param int $id
 	 * @throws \OCP\AppFramework\Db\DoesNotExistException if not found
 	 * @throws \OCP\AppFramework\Db\MultipleObjectsReturnedException if more than one result
+	 * @return Location
 	 */
 	public function find($id) {
 		$sql = 'SELECT * FROM `*PREFIX*maps_locations` '.
@@ -20,6 +22,14 @@ public function find($id) {
 		return $this->findEntity($sql, [$id]);
 	}
 
+	/**
+	 * @param string $deviceHash
+	 * @param string $from
+	 * @param string $until
+	 * @param int $limit
+	 * @param int $offset
+	 * @return Location[]
+	 */
 	public function findBetween($deviceHash, $from, $until, $limit=null, $offset=null) {
 		$sql = 'SELECT * FROM `*PREFIX*maps_locations` '.
 			'WHERE `device_hash` = ?'.
@@ -27,7 +37,11 @@ public function findBetween($deviceHash, $from, $until, $limit=null, $offset=nul
 		return $this->findEntities($sql, [$deviceHash, $from, $until], $limit, $offset);
 	}
 
-
+	/**
+	 * @param int $limit
+	 * @param int $offset
+	 * @return Location[]
+	 */
 	public function findAll($limit=null, $offset=null) {
 		$sql = 'SELECT * FROM `*PREFIX*maps_locations`';
 		return $this->findEntities($sql, $limit, $offset);