Bug 57283 JavaDocExport: if destination path has spaces, the JavaDoc is generated into the incorrect (truncated) path or fails [javadoc]
Steps to reproduce (Eclipse3.0M8): Create a project with any name; Create some classes there; Execute Export->Javadoc. In the wizard, in the destination editbox, type any name that contains spaces. If the spaces are only in the last segment of the path (say, c:\tmp\my project), the javadoc is just generated in the incorrect (truncated) location (in this example, c:\tmp\my). If there are spaces before the last segment (e.g., c:\Documents and Settings\user\My Documents\my project), generation only produces 2 empty folders (in this example, C:\Documents and the destination that was typed) and fails to do anything else.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javadocexport/JavadocOptionsManager.java
/**
	 * @param project
	 */
	public void updateRecentSettings(IJavaProject project) {
		fRecentSettings.setProjectSettings(project, fDestination, fAntpath, fHRefs);
	}
	
	private static String initJavadocCommandDefault() {
		IPreferenceStore store= JavaPlugin.getDefault().getPreferenceStore();
		String cmd= store.getString(PreferenceConstants.JAVADOC_COMMAND);	
		if (cmd != null && cmd.length() > 0) {
			store.setToDefault(PreferenceConstants.JAVADOC_COMMAND);
			return cmd;
		}
		
		File file= findJavaDocCommand();
		if (file != null) {
			return file.getPath();
		}
		return ""; 
	}
	
	private static File findJavaDocCommand() {
		IVMInstall install= JavaRuntime.getDefaultVMInstall();
		if (install != null) {
			File res= getCommand(install);
			if (res != null) {
				return res;
			}
		}