diff --git a/project.libraries/apichanges.xml b/project.libraries/apichanges.xml
--- a/project.libraries/apichanges.xml
+++ b/project.libraries/apichanges.xml
@@ -107,7 +107,20 @@
     <!-- ACTUAL CHANGES BEGIN HERE: -->
     <changes>
 
-        <change id="create-library-with-properties">
+    <change id="LibrariesSupport.createLibraryImplementation3">
+        <api name="general"/>
+        <summary>Added a new factory method to create default implementation of <code>LibraryImplementation3</code></summary>
+        <version major="1" minor="39"/>
+        <date day="30" month="8" year="2011"/>
+        <author login="tzezula"/>
+        <compatibility addition="yes"/>
+        <description>
+            Added a new factory method to create default implementation of <code>LibraryImplementation3</code>.
+        </description>
+        <class package="org.netbeans.spi.project.libraries.support" name="LibrariesSupport"/>
+        <issue number="217321"/>
+    </change>
+    <change id="create-library-with-properties">
         <api name="general"/>
         <summary>Added methods to create a new <code>Library</code> with properties</summary>
         <version major="1" minor="38"/>
diff --git a/project.libraries/manifest.mf b/project.libraries/manifest.mf
--- a/project.libraries/manifest.mf
+++ b/project.libraries/manifest.mf
@@ -1,7 +1,7 @@
 Manifest-Version: 1.0
 OpenIDE-Module: org.netbeans.modules.project.libraries/1
 OpenIDE-Module-Layer: org/netbeans/modules/project/libraries/resources/mf-layer.xml
-OpenIDE-Module-Specification-Version: 1.38
+OpenIDE-Module-Specification-Version: 1.39
 OpenIDE-Module-Localizing-Bundle: org/netbeans/modules/project/libraries/resources/Bundle.properties
 AutoUpdate-Show-In-Client: false
 
diff --git a/project.libraries/src/org/netbeans/modules/project/libraries/DefaultLibraryImplementation.java b/project.libraries/src/org/netbeans/modules/project/libraries/DefaultLibraryImplementation.java
--- a/project.libraries/src/org/netbeans/modules/project/libraries/DefaultLibraryImplementation.java
+++ b/project.libraries/src/org/netbeans/modules/project/libraries/DefaultLibraryImplementation.java
@@ -77,11 +77,15 @@
     /**
      * Create new LibraryImplementation supporting given <tt>library</tt>.
      */
-    public DefaultLibraryImplementation (String libraryType, String[] volumeTypes) {
-        assert libraryType != null && volumeTypes != null;
+    public DefaultLibraryImplementation (
+            @NonNull final String libraryType,
+            @NonNull final String[] volumeTypes) {
+        Parameters.notNull("libraryType", libraryType); //NOI18N
+        Parameters.notNull("volumeTypes", volumeTypes); //NOI18N
         this.libraryType = libraryType;
         this.contents = new HashMap<String,List<URL>>();
         for (String vtype : volumeTypes) {
+            Parameters.notNull("volumeTypes", vtype);   //NOI18N
             this.contents.put(vtype, Collections.<URL>emptyList());
         }
     }
diff --git a/project.libraries/src/org/netbeans/spi/project/libraries/support/LibrariesSupport.java b/project.libraries/src/org/netbeans/spi/project/libraries/support/LibrariesSupport.java
--- a/project.libraries/src/org/netbeans/spi/project/libraries/support/LibrariesSupport.java
+++ b/project.libraries/src/org/netbeans/spi/project/libraries/support/LibrariesSupport.java
@@ -52,6 +52,7 @@
 import org.netbeans.modules.project.libraries.LibraryTypeRegistry;
 import org.netbeans.spi.project.libraries.LibraryImplementation;
 import org.netbeans.modules.project.libraries.DefaultLibraryImplementation;
+import org.netbeans.spi.project.libraries.LibraryImplementation3;
 import org.netbeans.spi.project.libraries.LibraryTypeProvider;
 import org.openide.filesystems.FileObject;
 import org.openide.filesystems.URLMapper;
@@ -68,6 +69,19 @@
     private LibrariesSupport () {
     }
 
+    /**
+     * Creates default {@link LibraryImplementation3}
+     * @param libraryType type of library
+     * @param volumeTypes types of supported volumes
+     * @return LibraryImplementation3
+     * @since 1.39
+     */
+    @NonNull
+    public static LibraryImplementation3 createLibraryImplementation3 (
+            @NonNull final String libraryType,
+            @NonNull final String[] volumeTypes) {
+        return new DefaultLibraryImplementation (libraryType, volumeTypes);
+    }
 
     /**
      * Creates default LibraryImplementation
@@ -76,7 +90,7 @@
      * @return LibraryImplementation, never return null
      */
     public static LibraryImplementation createLibraryImplementation (String libraryType, String[] volumeTypes) {
-        return new DefaultLibraryImplementation (libraryType, volumeTypes);
+        return createLibraryImplementation3(libraryType, volumeTypes);
     }
     
     /**