Updated for various code warnings

This commit addresses a number of deprications and other code warnings.
There are still many more to address, but this is a start.

spring-batch-test/src/main/java/org/springframework/batch/test/AbstractJobTests.java

@@ -126,7 +126,6 @@ public abstract class AbstractJobTests implements ApplicationContextAware {
 	 * Launch the entire job, including all steps.
 	 * 
 	 * @return JobExecution, so that the test can validate the exit status
-	 * @throws Exception
 	 */
 	protected JobExecution launchJob() throws Exception {
 		return this.launchJob(this.getUniqueJobParameters());
@@ -135,9 +134,8 @@ public abstract class AbstractJobTests implements ApplicationContextAware {
 	/**
 	 * Launch the entire job, including all steps
 	 * 
-	 * @param jobParameters
+	 * @param jobParameters parameters for the job
 	 * @return JobExecution, so that the test can validate the exit status
-	 * @throws Exception
 	 */
 	protected JobExecution launchJob(JobParameters jobParameters) throws Exception {
 		return getJobLauncher().run(this.job, jobParameters);

spring-batch-test/src/main/java/org/springframework/batch/test/DataSourceInitializer.java

@@ -98,7 +98,7 @@ public class DataSourceInitializer implements InitializingBean, DisposableBean {
 
     @Override
 	public void afterPropertiesSet() throws Exception {
-		Assert.notNull(dataSource);
+		Assert.notNull(dataSource, "A DataSource is required");
 		initialize();
 	}