You can edit a manifest from the Project Explorer.
Procedure
In the Project Explorer view, double-click the
META-INF/MANIFEST.MF file of the Java component
implementation's plug-in project.
The manifest file opens in the manifest editor.
Click the
Runtime tab.
In the Exported Packages pane, select all the packages and click
Remove.
Click
Add....
The Exported Packages dialog displays.
In the Exported Packages dialog, click the package containing the
component implementation's classes and click
OK.
The package is added to the Exported Packages list.
Click
Properties.
In the Version field, set the version to the same value as that of
the Java component implementation plug-in, without the literal "qualifier"
component.
Click the
MANIFEST.MF tab. If there is a
Bundle-Localization attribute, click the
Build tab and ensure that the
plugin.properties checkbox is checked.