Bug 296646 Creating regular file under group gives wrong warning in wizard
Build id: I20091125-2200 1) Create a new group folder 2) Select the group, and do File > New > File 3) Type "a.txt" The wizard now says: 'a.' is an invalid name on this platform It looks like the error message is not being updated correctly as the user types.
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/WizardNewFileCreationPage.java
* Set the only file extension allowed for this page's file name field. If
	 * this page's controls do not exist yet, store it for future use. <br>
	 * <br>
	 * If a file extension is specified, then it will always be appended with a
	 * '.' to the text from the file name field for validation when the
	 * following conditions are met: <br>
	 * <br>
	 * (1) File extension length is greater than 0 <br>
	 * (2) File name field text length is greater than 0 <br>
	 * (3) File name field text does not already end with a '.' and the file
	 * extension specified (case sensitive) <br>
	 * <br>
	 * The file extension will not be reflected in the actual file name field
	 * until the file name field loses focus.
	 * 
	 * @param value
	 *            The file extension without the '.' prefix (e.g. 'java', 'xml')
	 * @since 3.3
	 */
	public void setFileExtension(String value) {
		if (resourceGroup == null) {
			initialFileExtension = value;
		} else {
			resourceGroup.setResourceExtension(value);
		}
	}
	/**
	 * Checks whether the linked resource target is valid. Sets the error
	 * message accordingly and returns the status.
	 *