diff --git a/docs/Architektur.pptx b/docs/Architektur.pptx
new file mode 100644
index 0000000..c09b6c1
Binary files /dev/null and b/docs/Architektur.pptx differ
diff --git a/misc/create_schema.sql b/misc/create_schema.sql
new file mode 100644
index 0000000..1338ffc
--- /dev/null
+++ b/misc/create_schema.sql
@@ -0,0 +1,68 @@
+CREATE DATABASE `bremen_calling` /*!40100 DEFAULT CHARACTER SET utf8mb4 */;
+
+CREATE TABLE `participant` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `name` varchar(128) DEFAULT NULL,
+  `street` varchar(128) DEFAULT NULL,
+  `postal_code` varchar(5) DEFAULT NULL,
+  `city` varchar(64) DEFAULT NULL,
+  `flags` int(10) unsigned DEFAULT NULL,
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='An organization taking part';
+
+
+CREATE TABLE `ship` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `name` varchar(45) DEFAULT NULL,
+  `imo` int(11) DEFAULT NULL,
+  `callsign` varchar(8) DEFAULT NULL,
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+
+CREATE TABLE `shipcall` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `ship_id` int(11) DEFAULT NULL,
+  `type` tinyint(4) DEFAULT NULL,
+  `eta` datetime DEFAULT NULL,
+  `voyage` varchar(16) DEFAULT NULL,
+  `etd` datetime DEFAULT NULL,
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='Incoming, outgoing or moving to another berth	';
+
+
+CREATE TABLE `times` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `start_planned` datetime DEFAULT NULL,
+  `end_planned` datetime DEFAULT NULL,
+  `duration_planned` int(11) DEFAULT NULL,
+  `start_actual` datetime DEFAULT NULL,
+  `end_actual` datetime DEFAULT NULL,
+  `duration_actual` int(11) DEFAULT NULL,
+  `shipcall_id` int(11) DEFAULT NULL,
+  `participant_id` int(11) DEFAULT NULL,
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='the planned time for the participants work';
+
+
+CREATE TABLE `user` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `participant_id` int(11) DEFAULT NULL,
+  `first_name` varchar(45) DEFAULT NULL,
+  `last_name` varchar(45) DEFAULT NULL,
+  `user_name` varchar(45) DEFAULT NULL,
+  `password_hash` varchar(128) DEFAULT NULL,
+  `api_key` varchar(256) DEFAULT NULL,
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='member of a participant';
+
+
+CREATE TABLE `participant` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `name` varchar(128) DEFAULT NULL,
+  `street` varchar(128) DEFAULT NULL,
+  `postal_code` varchar(5) DEFAULT NULL,
+  `city` varchar(64) DEFAULT NULL,
+  `flags` int(10) unsigned DEFAULT NULL,
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='An organization taking part';