# HG changeset patch
# Parent e1f88e87dfa5860ffce43ca335e9d43124ab7c83
diff --git a/xml.axi/src/org/netbeans/modules/xml/axi/impl/ModelAccessImpl.java b/xml.axi/src/org/netbeans/modules/xml/axi/impl/ModelAccessImpl.java
--- a/xml.axi/src/org/netbeans/modules/xml/axi/impl/ModelAccessImpl.java
+++ b/xml.axi/src/org/netbeans/modules/xml/axi/impl/ModelAccessImpl.java
@@ -114,7 +114,7 @@
             SchemaGeneratorFactory sgf = SchemaGeneratorFactory.getDefault();			
             sgf.updateSchema(model.getSchemaModel(), model.getSchemaDesignPattern());
         } catch (Exception ex) {
-            throw new IllegalArgumentException("Exception during flush: ",ex); //NOI18N
+            throw new IllegalStateException("Exception during flush: ",ex); //NOI18N
         } finally {
             model.getPropertyChangeListener().clearEvents();
         }
diff --git a/xml.xam/src/org/netbeans/modules/xml/xam/AbstractModel.java b/xml.xam/src/org/netbeans/modules/xml/xam/AbstractModel.java
--- a/xml.xam/src/org/netbeans/modules/xml/xam/AbstractModel.java
+++ b/xml.xam/src/org/netbeans/modules/xml/xam/AbstractModel.java
@@ -343,8 +343,17 @@
         return transaction != null;
     }
 
+    /**
+     * Ends the transaction and commits changes to the document.
+     * The operation may throw {@link IllegalStateException} if it is not possible to 
+     * flush changes, because e.g. file is read-only, deleted or the document is changed
+     * in an incompatible way during the transaction.
+     * 
+     * @throws IllegalStateException when the backing file/document is read-only or the document
+     * changed in a way that prevent application of changes.
+     */
     @Override
-    public synchronized void endTransaction() {
+    public synchronized void endTransaction() throws IllegalStateException {
         endTransaction(false);
     }