Simplify configuration

persistence/src/PersistenceModule.kt

@@ -23,7 +23,11 @@ class PersistenceModule {
     internal fun dataSource(conf: DataSourceConfig): HikariDataSource {
         val hikariConfig = HikariConfig().also {
             it.jdbcUrl = conf.jdbcUrl
-            it.driverClassName = conf.driverClassName
+            it.driverClassName = when {
+                conf.jdbcUrl.startsWith("jdbc:mariadb") -> "org.mariadb.jdbc.Driver"
+                conf.jdbcUrl.startsWith("jdbc:h2") -> "org.h2.Driver"
+                else -> error("Unsupported database")
+            }
             it.username = conf.username
             it.password = conf.password
             it.maximumPoolSize = conf.maximumPoolSize

persistence/test/DataSources.kt

@@ -7,7 +7,6 @@ class KMariadbContainer : MariaDBContainer<KMariadbContainer>("mariadb:10.5.5")
 
 fun h2dataSourceConfig() = DataSourceConfig(
     jdbcUrl = "jdbc:h2:mem:regular;DB_CLOSE_DELAY=-1;",
-    driverClassName = "org.h2.Driver",
     username = "h2",
     password = "",
     maximumPoolSize = 2,
@@ -16,7 +15,6 @@ fun h2dataSourceConfig() = DataSourceConfig(
 
 fun mariadbDataSourceConfig(jdbcUrl: String) = DataSourceConfig(
     jdbcUrl = jdbcUrl,
-    driverClassName = "org.mariadb.jdbc.Driver",
     username = "test",
     password = "test",
     maximumPoolSize = 2,