Add missing "MARIADB" datasource backend to the configuration file, remove "mySQLDriverClassName" property as it is no longer needed.

src/main/java/fr/xephi/authme/datasource/MariaDB.java

@@ -15,6 +15,11 @@ public class MariaDB extends MySQL {
         return "jdbc:mariadb://" + host + ":" + port + "/" + database;
     }
 
+    @Override
+    protected String getDriverClassName() {
+        return "org.mariadb.jdbc.Driver";
+    }
+
     @Override
     public DataSourceType getType() {
         return DataSourceType.MARIADB;

src/main/java/fr/xephi/authme/datasource/MySQL.java

@@ -44,7 +44,6 @@ public class MySQL extends AbstractSqlDataSource {
     private String port;
     private String username;
     private String password;
-    private String className;
     private String database;
     private String tableName;
     private int poolSize;
@@ -90,6 +89,15 @@ public class MySQL extends AbstractSqlDataSource {
         setParameters(settings, extensionsFactory);
     }
 
+    /**
+     * Returns the path of the Driver class to use when connecting to the database.
+     *
+     * @return the dotted path of the SQL driver class to be used
+     */
+    protected String getDriverClassName() {
+        return "com.mysql.cj.jdbc.Driver";
+    }
+
     /**
      * Retrieves various settings.
      *
@@ -101,14 +109,6 @@ public class MySQL extends AbstractSqlDataSource {
         this.port = settings.getProperty(DatabaseSettings.MYSQL_PORT);
         this.username = settings.getProperty(DatabaseSettings.MYSQL_USERNAME);
         this.password = settings.getProperty(DatabaseSettings.MYSQL_PASSWORD);
-        this.className = settings.getProperty(DatabaseSettings.MYSQL_DRIVER_CLASS_NAME);
-        try {
-            Class.forName(this.className);
-        } catch (ClassNotFoundException e) {
-            this.className = DatabaseSettings.MYSQL_DRIVER_CLASS_NAME.getDefaultValue();
-            logger.info("Driver class '" + this.className + "' not found! Falling back to the built-in MySQL driver ("
-                + this.className + ")");
-        }
         this.database = settings.getProperty(DatabaseSettings.MYSQL_DATABASE);
         this.tableName = settings.getProperty(DatabaseSettings.MYSQL_TABLE);
         this.columnOthers = settings.getProperty(HooksSettings.MYSQL_OTHER_USERNAME_COLS);
@@ -141,7 +141,7 @@ public class MySQL extends AbstractSqlDataSource {
         ds.setPassword(this.password);
         
         // Driver
-        ds.setDriverClassName(this.className);
+        ds.setDriverClassName(this.getDriverClassName());
 
         // Request mysql over SSL
         ds.addDataSourceProperty("useSSL", String.valueOf(useSsl));

src/main/java/fr/xephi/authme/settings/SettingsMigrationService.java

@@ -6,6 +6,7 @@ import ch.jalu.configme.properties.Property;
 import ch.jalu.configme.properties.convertresult.PropertyValue;
 import ch.jalu.configme.resource.PropertyReader;
 import fr.xephi.authme.ConsoleLogger;
+import fr.xephi.authme.datasource.DataSourceType;
 import fr.xephi.authme.initialization.DataFolder;
 import fr.xephi.authme.output.ConsoleLoggerFactory;
 import fr.xephi.authme.output.LogLevel;
@@ -65,10 +66,10 @@ public class SettingsMigrationService extends PlainMigrationService {
             configurationData.setValue(ALLOWED_NICKNAME_CHARACTERS, "[a-zA-Z0-9_]*");
             changes = true;
         }
-        String driverClass = reader.getString(DatabaseSettings.MYSQL_DRIVER_CLASS_NAME.getPath());
-        if ("com.mysql.jdbc.Driver".equals(driverClass) || "com.mysql.cj.jdbc.Driver".equals(driverClass)) {
-            configurationData.setValue(DatabaseSettings.MYSQL_DRIVER_CLASS_NAME,
-                DatabaseSettings.MYSQL_DRIVER_CLASS_NAME.getDefaultValue());
+
+        String driverClass = reader.getString("DataSource.mySQLDriverClassName");
+        if ("fr.xephi.authme.libs.org.mariadb.jdbc.Driver".equals(driverClass)) {
+            configurationData.setValue(DatabaseSettings.BACKEND, DataSourceType.MARIADB);
             changes = true;
         }
 
@@ -100,7 +101,7 @@ public class SettingsMigrationService extends PlainMigrationService {
             "settings.restrictions.keepCollisionsDisabled", "settings.forceCommands", "settings.forceCommandsAsConsole",
             "settings.forceRegisterCommands", "settings.forceRegisterCommandsAsConsole",
             "settings.sessions.sessionExpireOnIpChange", "settings.restrictions.otherAccountsCmd",
-            "settings.restrictions.otherAccountsCmdThreshold"};
+            "settings.restrictions.otherAccountsCmdThreshold, DataSource.mySQLDriverClassName"};
         for (String deprecatedPath : deprecatedProperties) {
             if (reader.contains(deprecatedPath)) {
                 return true;

src/main/java/fr/xephi/authme/settings/properties/DatabaseSettings.java

@@ -10,7 +10,7 @@ import static ch.jalu.configme.properties.PropertyInitializer.newProperty;
 public final class DatabaseSettings implements SettingsHolder {
 
     @Comment({"What type of database do you want to use?",
-        "Valid values: SQLITE, MYSQL, POSTGRESQL"})
+        "Valid values: SQLITE, MARIADB, MYSQL, POSTGRESQL"})
     public static final Property<DataSourceType> BACKEND =
         newProperty(DataSourceType.class, "DataSource.backend", DataSourceType.SQLITE);
 
@@ -49,13 +49,6 @@ public final class DatabaseSettings implements SettingsHolder {
     @Comment("Password to connect to the MySQL database")
     public static final Property<String> MYSQL_PASSWORD =
         newProperty("DataSource.mySQLPassword", "12345");
-    
-    @Comment({"Driver Name of the MySQL database.",
-        "Built-in drivers:",
-        "    MySQL: 'fr.xephi.authme.libs.com.mysql.cj.jdbc.Driver'",
-        "    MariaDB: 'fr.xephi.authme.libs.org.mariadb.jdbc.Driver'"})
-    public static final Property<String> MYSQL_DRIVER_CLASS_NAME =
-        newProperty("DataSource.mySQLDriverClassName", "fr.xephi.authme.libs.com.mysql.cj.jdbc.Driver");
 
     @Comment("Database Name, use with converters or as SQLITE database name")
     public static final Property<String> MYSQL_DATABASE =