diff --git a/src/Concept/Database.php b/src/Concept/Database.php
new file mode 100644
index 0000000..0ed1e0d
--- /dev/null
+++ b/src/Concept/Database.php
@@ -0,0 +1,20 @@
+<?php
+namespace ProVM\Concept;
+
+use PDO;
+
+interface Database
+{
+    public function setHost(string $host): Database;
+    public function getHost(): string;
+    public function setPort(int $port): Database;
+    public function getPort(): int;
+    public function setName(string $name): Database;
+    public function getName(): string;
+    public function setUsername(string $username): Database;
+    public function getUsername(): string;
+    public function setPassword(string $password): Database;
+    public function getPassword(): string;
+    public function needsUser(): bool;
+    public function getDSN(): string;
+}
diff --git a/src/Concept/Database/Connection.php b/src/Concept/Database/Connection.php
new file mode 100644
index 0000000..1f37c8b
--- /dev/null
+++ b/src/Concept/Database/Connection.php
@@ -0,0 +1,18 @@
+<?php
+namespace ProVM\Concept\Database;
+
+use PDO;
+use ProVM\Concept\Database;
+
+interface Connection
+{
+    public function setDatabase(Database $database): Connection;
+    public function getDatabase(): Database;
+    public function connect(): Connection;
+    public function setPDO(PDO $pdo): Connection;
+    public function getPDO(): PDO;
+    public function query(string $query): ResultSet;
+    public function prepare(string $query): ResultSet;
+    public function execute(string $query, array $values): ResultSet;
+    public function transaction(): Transaction;
+}
diff --git a/src/Concept/Database/ResultSet.php b/src/Concept/Database/ResultSet.php
new file mode 100644
index 0000000..c2163ee
--- /dev/null
+++ b/src/Concept/Database/ResultSet.php
@@ -0,0 +1,13 @@
+<?php
+namespace ProVM\Concept\Database;
+
+use PDOStatement;
+
+interface ResultSet
+{
+    public function __construct(PDOStatement $statement);
+    public function execute(array $values): ResultSet;
+    public function getAsArray(): array;
+    public function getAsObject(): array;
+    public function getFirst(): mixed;
+}
diff --git a/src/Concept/Database/Transaction.php b/src/Concept/Database/Transaction.php
new file mode 100644
index 0000000..b3fa0e9
--- /dev/null
+++ b/src/Concept/Database/Transaction.php
@@ -0,0 +1,12 @@
+<?php
+namespace ProVM\Concept\Database;
+
+interface Transaction
+{
+    public function begin(): Transaction;
+    public function query(string $query): ResultSet;
+    public function prepare(string $query): ResultSet;
+    public function execute(string $query, array $values): ResultSet;
+    public function commit(): void;
+    public function rollBack(): void;
+}