remove unnecessary exceptions from capability list api

Author: richard-jones

src/main/java/org/openarchives/resourcesync/CapabilityList.java

@@ -84,26 +84,50 @@ public URL addCapableUrl(String loc, String capability)
     }
 
     public URL setResourceList(String loc)
-            throws SpecComplianceException
     {
-        return this.addCapableUrl(loc, ResourceSync.CAPABILITY_RESOURCELIST);
+        try
+        {
+            return this.addCapableUrl(loc, ResourceSync.CAPABILITY_RESOURCELIST);
+        }
+        catch (SpecComplianceException e)
+        {
+            return null;
+        }
     }
 
     public URL setResourceDump(String loc)
-            throws SpecComplianceException
     {
-        return this.addCapableUrl(loc, ResourceSync.CAPABILITY_RESOURCEDUMP);
+        try
+        {
+            return this.addCapableUrl(loc, ResourceSync.CAPABILITY_RESOURCEDUMP);
+        }
+        catch (SpecComplianceException e)
+        {
+            return null;
+        }
     }
 
     public URL setChangeList(String loc)
-            throws SpecComplianceException
     {
-        return this.addCapableUrl(loc, ResourceSync.CAPABILITY_CHANGELIST);
+        try
+        {
+            return this.addCapableUrl(loc, ResourceSync.CAPABILITY_CHANGELIST);
+        }
+        catch (SpecComplianceException e)
+        {
+            return null;
+        }
     }
 
     public URL setChangeDump(String loc)
-            throws SpecComplianceException
     {
-        return this.addCapableUrl(loc, ResourceSync.CAPABILITY_CHANGEDUMP);
+        try
+        {
+            return this.addCapableUrl(loc, ResourceSync.CAPABILITY_CHANGEDUMP);
+        }
+        catch (SpecComplianceException e)
+        {
+            return null;
+        }
     }
 }