### Eclipse Workspace Patch 1.0
#P org.eclipse.mtj.core
Index: src/org/eclipse/mtj/internal/core/util/Utils.java
===================================================================
--- src/org/eclipse/mtj/internal/core/util/Utils.java	(revision 1344)
+++ src/org/eclipse/mtj/internal/core/util/Utils.java	(working copy)
@@ -25,6 +25,8 @@
  *     David Marques (Motorola) - Adding getSourceFolders method.
  *     David Marques (Motorola) - Adding isAutobuilding
  *     David Aragão (Motorola)  - Add isValidFolderName
+ *     Fernando Rocha(Motorola) - Refactor in isValidFolderName and add methods
+ *                                for marker management
  */
 package org.eclipse.mtj.internal.core.util;
 
@@ -51,6 +53,7 @@
 import org.eclipse.core.resources.IContainer;
 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IFolder;
+import org.eclipse.core.resources.IMarker;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IWorkspace;
@@ -1372,10 +1375,41 @@
      * @return
      */
     public static boolean isValidFolderName(String folderName) {
-		String property = System.getProperty("java.io.tmpdir");
-		File folder = new File(property, folderName);
-		return (folder.exists() || folder.mkdir());
+                IWorkspace workspace = MTJCore.getWorkspace();
+                IStatus result = workspace.validateName(folderName, IResource.FOLDER);
+		return result.isOK();
 	}
+    
+    /**
+     * Verifies if a file name is valid.
+     * @param fileName
+     * @return
+     */
+    public static boolean isValidFileName(String fileName) {
+        IWorkspace workspace = MTJCore.getWorkspace();
+        IStatus result = workspace.validateName(fileName, IResource.FOLDER);
+        return result.isOK();
+    }
 
+    /**
+     * Create an error marker in a resource 
+     * @param resource
+     * @param message
+     * @throws CoreException
+     */
+    public static void createErrorMarker(IResource resource, String message) throws CoreException {
+        IMarker marker = resource.createMarker("org.eclipse.mtj.core.problem");
+        marker.setAttribute(IMarker.MESSAGE, message);
+        marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
+    }
+    
+    /**
+     * Remove all the error markers
+     * @param resource
+     * @throws CoreException
+     */
+    public static void removeAllErrorMarkers(IResource resource) throws CoreException {
+        resource.deleteMarkers("org.eclipse.mtj.core.problem", false, IResource.DEPTH_ZERO);
+    }
     
 }
#P org.eclipse.mtj.ui
Index: src/org/eclipse/mtj/internal/ui/editors/jad/form/pages/OverviewEditorPage.java
===================================================================
--- src/org/eclipse/mtj/internal/ui/editors/jad/form/pages/OverviewEditorPage.java	(revision 1345)
+++ src/org/eclipse/mtj/internal/ui/editors/jad/form/pages/OverviewEditorPage.java	(working copy)
@@ -13,9 +13,11 @@
  *                               Configuration Manager, for Multi-configs support.
  *     Diego Sandin (Motorola) - Use Eclipse Message Bundles [Bug 255874]
  *     Fernando Rocha(Motorola)- Add validation to JAR URL.
+ *     Fernando Rocha(Motorola)- Problem marker for the description file.
  */
 package org.eclipse.mtj.internal.ui.editors.jad.form.pages;
 
+import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IWorkspace;
 import org.eclipse.core.runtime.CoreException;
@@ -157,15 +159,46 @@
     public void doSave(IProgressMonitor monitor) {
         super.doSave(monitor);
 
+        IFile applicationDescriptorFile = midletProject.getApplicationDescriptorFile();
+        try {
+            Utils.removeAllErrorMarkers(applicationDescriptorFile);
+        } catch (CoreException e) {
+            e.printStackTrace();
+        }
+        
         String currentJarUrl = getPreferenceStore().getString(
                 IJADConstants.JAD_MIDLET_JAR_URL);
+        String currentMidletName = getPreferenceStore().getString(IJADConstants.JAD_MIDLET_NAME);
+        String currentMidletVendor = getPreferenceStore().getString(IJADConstants.JAD_MIDLET_VENDOR);
+        String currentMidletVersion = getPreferenceStore().getString(IJADConstants.JAD_MIDLET_VERSION);
+        
+        if(currentMidletName.equals("")) {
+            try {
+                Utils.createErrorMarker(applicationDescriptorFile, "MIDLet name empty.");
+            } catch (CoreException e) {
+                e.printStackTrace();
+            }
+        }
+        if(currentMidletVendor.equals("")) {
+            try {
+                Utils.createErrorMarker(applicationDescriptorFile, "MIDLet vendor empty.");
+            } catch (CoreException e) {
+                e.printStackTrace();
+            }
+        }
+        if(currentMidletVersion.equals("")) {
+            try {
+                Utils.createErrorMarker(applicationDescriptorFile, "MIDLet version empty.");
+            } catch (CoreException e) {
+                e.printStackTrace();
+            }
+        }
         
-        IWorkspace workspace = MTJCore.getWorkspace();
-        IStatus result = workspace.validateName(currentJarUrl, IResource.FILE);
-        if (!result.isOK()) {
+        if (!Utils.isValidFileName(currentJarUrl)) {
             getPreferenceStore().putValue(IJADConstants.JAD_MIDLET_JAR_URL,
                     loadedJarUrl);
             getErrorMessageManager().removeAllMessages();
+            
         } else if (!currentJarUrl.substring(currentJarUrl.length() - 4)
                 .equalsIgnoreCase(".jar")) { //$NON-NLS-1$
             getPreferenceStore().putValue(IJADConstants.JAD_MIDLET_JAR_URL,