Bug 55056 [Workbench] would like to establish my workspace (and no longer be prompted)
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/IDEApplication.java
* Look at the argument URL for the workspace's version information. Return
	 * that version if found and null otherwise.
	 */
	private static String readWorkspaceVersion(URL workspace) {
		File versionFile = getVersionFile(workspace, false);
		if (versionFile == null || !versionFile.exists())
			return null;
		try {
			
			
			
			Properties props = new Properties();
			FileInputStream is = new FileInputStream(versionFile);
			try {
				props.load(is);
			} finally {
				is.close();
			}
			return props.getProperty(WORKSPACE_VERSION_KEY);
		} catch (IOException e) {
			IDEWorkbenchPlugin.log("Could not read version file", new Status( 
					IStatus.ERROR, IDEWorkbenchPlugin.IDE_WORKBENCH,
					IStatus.ERROR, e.getMessage(), e));
			return null;
		}
	}
	/**
	 * Write the version of the metadata into a known file overwriting any
	 * existing file contents. Writing the version file isn't really crucial,
	 * so the function is silent about failure