I connect into firebird throught jaybird. My connection class is a singleton list bellow:

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private FBConnection(){
        Properties prop = new Properties();
       
        try{
           
            FileInputStream fileinput = new FileInputStream(App.workdir+"/resources/config/config.properties");
            prop.load(fileinput);
            Class.forName("org.firebirdsql.jdbc.FBDriver");
            conn = DriverManager.getConnection("jdbc:firebirdsql:"+prop.getProperty("host")+"/"+prop.getProperty("port")+":"+prop.getProperty("arquivo")+"?lc_ctype=utf8" ,prop.getProperty("user"),prop.getProperty("password"));
   
        }catch(Exception e){
            e.printStackTrace();
        }
    }
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