diff --git a/build b/build
index 35da6ae..6d67b37 100755
--- a/build
+++ b/build
@@ -100,7 +100,7 @@ function task_database {
 	sleep 1;
 	mysql --host 127.0.0.1 --port 3306 --database "${database_name}" --user "${USER}" --password;
 	
-	kill $!; wait; sleep 0.5;
+	kill "${ssh_pid}"; wait; sleep 0.5;
 	task_end $?;
 }
 
diff --git a/logic/Repositories/IMeasurementDataRepository.php b/logic/Repositories/IMeasurementDataRepository.php
new file mode 100644
index 0000000..350285e
--- /dev/null
+++ b/logic/Repositories/IMeasurementDataRepository.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace AirQuality\Repositories;
+
+interface IMeasurementDataRepository {
+    public function get_readings_by_date(DateTime $datetime, string $reading_type);
+}
diff --git a/logic/Repositories/IMeasurementTypeRepository.php b/logic/Repositories/IMeasurementTypeRepository.php
new file mode 100644
index 0000000..f089103
--- /dev/null
+++ b/logic/Repositories/IMeasurementTypeRepository.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace AirQuality\Repositories;
+
+interface IMeasurementTypeRepository {
+	public function is_valid_type();
+    public function get_all_types();
+}