Add block to turn on UUID plugin.

src/main/java/space/kklochko/jdbc_hospital_example/db/repositories/blocks/TurnOnUUIDPlugin.java

@@ -0,0 +1,19 @@
+package space.kklochko.jdbc_hospital_example.db.repositories.blocks;
+
+import space.kklochko.jdbc_hospital_example.db.factories.DataBaseConnection;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+public class TurnOnUUIDPlugin {
+    public boolean create(DataBaseConnection db) {
+        try (Connection connection = db.connect()) {
+            Statement statement = connection.createStatement();
+            statement.execute("CREATE EXTENSION IF NOT EXISTS \"uuid-ossp\";");
+            return true;
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}