Bug 315315 Warning messages seen while starting up workbench
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/impl/SerializerImpl.java
Chart chart = null;
		try
		{
			chart = AccessController.doPrivileged( new PrivilegedExceptionAction<Chart>( ) {
				public Chart run( ) throws Exception
				{
					
					ResourceSet rsChart = new ResourceSetImpl( );
					rsChart.getResourceFactoryRegistry( )
							.getExtensionToFactoryMap( )
							.put( "chart", new ModelResourceFactoryImpl( ) ); 
					
					
					
					Resource rChart = null;
					StringBuffer sb = null;
					InputStream fis = null;
					FileWriter writer = null;
					try
					{
						fis = new FileInputStream( uri.toFileString( ) );
						sb = getChartStringFromStream( fis );
						File fTmp = File.createTempFile( "_ChartResource", ".chart" ); 
						writer = new FileWriter( fTmp );
						writer.write( sb.toString( ) );
						writer.flush( );
						URI uriEmbeddedModel = URI.createFileURI( fTmp.getAbsolutePath( ) );
						rChart = rsChart.getResource( uriEmbeddedModel, true );
						rChart.load( Collections.EMPTY_MAP );