catch rare EVIO errors (#1170)

Author: baltzell

common-tools/clas-detector/src/main/java/org/jlab/detector/decode/CodaDecoders.java

@@ -7,6 +7,7 @@
 import java.util.logging.Logger;
 import org.jlab.coda.jevio.CompositeData;
 import org.jlab.coda.jevio.DataType;
+import org.jlab.coda.jevio.EvioCompactStructureHandler;
 import org.jlab.coda.jevio.EvioException;
 import org.jlab.coda.jevio.EvioNode;
 import org.jlab.detector.decode.DetectorDataDgtz.ADCData;
@@ -30,7 +31,11 @@ public class CodaDecoders {
     public static List<EvioTreeBranch> getEventBranches(EvioDataEvent event){
         ArrayList<EvioTreeBranch>  branches = new ArrayList<>();
         try {
-            List<EvioNode> eventNodes = event.getStructureHandler().getNodes();
+            EvioCompactStructureHandler handler = event.getStructureHandler();
+            if (handler == null) {
+                return branches;
+            }
+            List<EvioNode> eventNodes = handler.getNodes();
             if (eventNodes==null) {
                 return branches;
             }

common-tools/clas-io/src/main/java/org/jlab/io/evio/EvioDataEventHandler.java

@@ -47,7 +47,7 @@ public EvioDataEventHandler(ByteBuffer buff){
         try {
             structure = new EvioCompactStructureHandler(evioBuffer,DataType.BANK);
             eventNodes = structure.getChildNodes();
-        } catch (EvioException ex) {
+        } catch (EvioException | IndexOutOfBoundsException | NullPointerException ex) {
             Logger.getLogger(EvioDataEvent.class.getName()).log(Level.SEVERE, null, ex);
         }
     }