Improve exception handling tooling.

module/exception/src/main/java/org/openbase/jul/exception/ExceptionProcessor.kt

@@ -143,3 +143,17 @@ val Throwable.causedBySystemShutdown get() = ExceptionProcessor.isCausedBySystem
 val Throwable.causedByInterruption get() = ExceptionProcessor.isCausedByInterruption(this)
 fun Throwable.setInitialCause(initialCause: Throwable?) =
     ExceptionProcessor.setInitialCause(this, initialCause)
+
+fun <O> tryOrNull(block: () -> O): O? =
+    try {
+        block()
+    } catch (e: NotAvailableException) {
+        null
+    }
+
+fun <I, O> I.tryOrNull(block: (I) -> O): O? =
+    try {
+        block(this)
+    } catch (e: NotAvailableException) {
+        null
+    }

module/exception/src/main/java/org/openbase/jul/exception/FatalImplementationErrorException.java

@@ -10,12 +10,12 @@
  * it under the terms of the GNU Lesser General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Lesser Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Lesser Public
  * License along with this program.  If not, see
  * <http://www.gnu.org/licenses/lgpl-3.0.html>.
@@ -77,10 +77,18 @@ public FatalImplementationErrorException(final Object source, final Throwable ca
         StackTracePrinter.detectDeadLocksAndPrintStackTraces(logger);
     }
 
+    /**
+     * Default constructor that can be used to restore a fatal implementation error from a serialized state.
+     */
+    public FatalImplementationErrorException(final String message, final Throwable cause) {
+        super(message, cause);
+    }
+
     /**
      * Method detects the class of the given instance. In case the instance itself is the class these one is directly returned.
      *
      * @param object
+     *
      * @return
      */
     private Class detectClass(final Object object) {