Websphere e DBCP

public class Dbcp { 
private static Dbcp instance = null; 
private DataSource ds; 
private Connection con; 
private String driver; 
private String url; 
private String login; 
private String password; 
private int maxConnections; 
private long maxWait; 

/** Creates a new instance of Dbpc */ 
public Dbcp() { 
	Properties props = new Properties(); 
	try { 
		InputStream fis = this.getClass().getClassLoader().getResourceAsStream("db.properties"); 
		props.load(fis); 
		fis.close(); 
	} 
	catch(FileNotFoundException f) { 
		System.out.println("File not found in Dbcp --> constructor." + f.getMessage()); 
		f.printStackTrace(); 
	} 
	catch(IOException ioex){ 
		System.out.println("Error I/O in Dbpc --> constructor." + ioex.getMessage()); 
		ioex.printStackTrace(); 
	} 
	catch(Exception e) { 
		System.out.println("Error in Dbpc --> constructor." + e.getMessage()); 
		e.printStackTrace(); 
	} 

	//recuperando configuracoes de acesso ao db 
	driver = props.getProperty("driver"); 
	url = props.getProperty("url"); 
	login = props.getProperty("login"); 
	password = props.getProperty("password"); 
	maxConnections = (new Integer(props.getProperty("maxConnections"))).intValue(); 
	maxWait = (new Long(props.getProperty("maxWait"))).longValue(); 
	ds = setupDataSource(); 
} 

public static Dbcp getInstance() { 
	if(instance == null) { 
		instance = new Dbcp(); 
	} 
	return instance; 
} 

public Connection getConn() throws SQLException { 
	return ds.getConnection(); 
} 

private DataSource setupDataSource() { 
	BasicDataSource ds = new BasicDataSource(); 
	ds.setDriverClassName(driver); 
	ds.setUsername(login); 

	ds.setPassword(password); 
	ds.setUrl(url); 
	ds.setMaxActive(maxConnections); 
	ds.setMaxWait(maxWait); 
	ds.setDefaultAutoCommit(false); 
	return ds; 
} 

public void printDataSourceStats() throws SQLException { 
	BasicDataSource bds = (BasicDataSource) ds; 
	System.out.println("NumActive: " + bds.getNumActive()); 
	System.out.println("NumIdle: " + bds.getNumIdle()); 
} 

/*shutdown DataSource*/ 
public void shutdown() throws SQLException { 
	BasicDataSource bds = (BasicDataSource) ds; 
	bds.close(); 
	} 
}