Add the database connection.

src/main/java/space/kklochko/jdbc_hospital_example/db/factories/DataBaseConnection.java

@@ -0,0 +1,21 @@
+package space.kklochko.jdbc_hospital_example.db.factories;
+
+import lombok.Setter;
+import space.kklochko.jdbc_hospital_example.config.models.DataBaseConfig;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+
+@Setter
+public class DataBaseConnection extends DataBaseConnectionFactory {
+    private DataBaseConfig dbConfig;
+
+    public DataBaseConnection(DataBaseConfig dbConfig) {
+        setDbConfig(dbConfig);
+    }
+
+    public Connection connect() throws SQLException {
+        return DriverManager.getConnection(dbConfig.getUrl(), dbConfig.getProperties());
+    }
+}

src/main/java/space/kklochko/jdbc_hospital_example/db/factories/DataBaseConnectionFactory.java

@@ -0,0 +1,8 @@
+package space.kklochko.jdbc_hospital_example.db.factories;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+
+public abstract class DataBaseConnectionFactory {
+    abstract public Connection connect() throws SQLException;
+}