Problemas com conexão ao banco de dados Firebird

/*
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package DAO;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

/**
 *
 * @author Leticia
 */
public class ConexaoBD
{

    private String url = "jdbc:firebirdsql://localhost:3050/C:\\Documents and Settings\\Leticia\\Meus documentos\\NetBeansProjects\\SHIPS\\src\\DAO\\BDSHIPS.fdb";
    private Connection con=null;
    private Statement stm=null;

    public static void main(String[] args) {
    }

    public ConexaoBD() throws SQLException , ClassNotFoundException
    {
	Class.forName("org.firebirdsql.jdbc.FBDriver");
	con = DriverManager.getConnection(url,"SYSDBA","masterkey");
	stm = con.createStatement();
    }

    public Statement getConexao() throws ClassNotFoundException, SQLException
    {
	return stm;
    }

    public ResultSet executarResearch(String sql)
    {
	ResultSet rs = null;
	try
        {
	   rs = this.stm.executeQuery(sql);
	   if (rs!=null)
           {
	      return rs;
           }
	}catch(SQLException e)
        {
	    System.out.println("Sql erro ao executar o comando SQL. Msg: "+e.getMessage());
	}
        catch(Exception e)
        {
	   System.out.println("Erro ao executar o comando SQL. Msg: "+e.getMessage());
	}

	return null;
    }

    public void executarUpdate(String sql)
    {
	try
        {
	    stm.executeUpdate(sql);
	}
        catch(Exception e)
        {
	    System.out.println("Erro ao executar o comando SQL. Msg: "+e.getMessage());
	}
    }

    public void executarInsert(String sql)
    {
        try
        {
          stm.executeUpdate(sql);
        }
        catch(Exception e)
        {
	    System.out.println("Erro ao executar o comando SQL. Msg: "+e.getMessage());
	}
    }

     public void executarDelete(String sql)
    {
        try
        {
          stm.executeUpdate(sql);
        }
        catch(Exception e)
        {
	    System.out.println("Erro ao executar o comando SQL. Msg: "+e.getMessage());
	}
    }

}