Bug 10593 Jar export should add ".jar" suffix if not specified
Build 20020228 - select some files - export them using the jar export - enter "test" as the jar name - it creates a jar file called "test" It should use "test.jar".
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/jarpackager/JarPackageWizardPage.java
fJarPackage.setCompress(fCompressCheckbox.getSelection());
		fJarPackage.setOverwrite(fOverwriteCheckbox.getSelection());
	}
	protected IPath getPathFromString(String text) {
		return new Path(text).makeAbsolute();
	}
	/**
	 * Returns a boolean indicating whether the passed File handle is
	 * is valid and available for use.
	 *
	 * @return boolean
	 */
	protected boolean ensureTargetFileIsValid(File targetFile) {
		if (targetFile.exists() && targetFile.isDirectory()) {
			setErrorMessage(JarPackagerMessages.getString("JarPackageWizardPage.error.exportDestinationMustNotBeDirectory")); 
			fDestinationNamesCombo.setFocus();
			return false;
		}
		if (targetFile.exists()) {
			if (!targetFile.canWrite()) {
				setErrorMessage(JarPackagerMessages.getString("JarPackageWizardPage.error.jarFileExistsAndNotWritable")); 
				fDestinationNamesCombo.setFocus();
				return false;
			}
		}
		return true;
	}
	/*
	 * Overrides method from WizardExportPage