Why was this catch empty?

src/main/java/com/gmail/nossr50/util/blockmeta/conversion/BlockStoreConversionZDirectory.java

@@ -116,7 +116,7 @@ public class BlockStoreConversionZDirectory implements Runnable {
 
                                 this.newManager.setTrue(this.cxPos, this.y2, this.czPos, this.world);
                             }
-                            catch (Exception e) {}
+                            catch (Exception e) { e.printStackTrace(); }
                         }
                     }
                 }