improve hibernate support

src/main/java/com/alibaba/druid/support/hibernate/DruidConnectionProvider.java

@@ -32,6 +32,10 @@ public class DruidConnectionProvider implements ConnectionProvider, Configurable
 
     private DruidDataSource   dataSource;
 
+    public DruidConnectionProvider(){
+        dataSource = new DruidDataSource();
+    }
+
     @SuppressWarnings("rawtypes")
     @Override
     public boolean isUnwrappableAs(Class unwrapType) {

src/test/java/com/alibaba/druid/bvt/support/hibernate/DruidConnectionProviderTest.java

@@ -0,0 +1,37 @@
+package com.alibaba.druid.bvt.support.hibernate;
+
+import java.sql.Connection;
+import java.util.HashMap;
+import java.util.Map;
+
+import junit.framework.TestCase;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.support.hibernate.DruidConnectionProvider;
+
+
+public class DruidConnectionProviderTest extends TestCase {
+    private DruidConnectionProvider provider;
+    
+    protected void setUp() throws Exception {
+        provider = new DruidConnectionProvider();
+        
+        Map properties = new HashMap<String, Object>();
+        properties.put("url", "jdbc:mock:xxx");
+        
+        provider.configure(properties);
+    }
+    
+    protected void tearDown() throws Exception {
+        provider.stop();
+    }
+    
+    public void test_hibernate() throws Exception {
+        Connection conn = provider.getConnection();
+        Assert.assertFalse(conn.isClosed());
+        
+        provider.closeConnection(conn);
+        Assert.assertTrue(conn.isClosed());
+    }
+}