Why are these empty part 2

src/main/java/com/gmail/nossr50/util/blockmeta/chunkmeta/HashChunkManager.java

@@ -151,7 +151,7 @@ public class HashChunkManager implements ChunkManager {
         try {
             chunkStore = readChunkStore(world, cx, cz);
         }
-        catch (Exception e) {}
+        catch (Exception e) { e.printStackTrace(); }
 
         if (chunkStore == null) {
             return;

src/main/java/com/gmail/nossr50/util/blockmeta/chunkmeta/PrimitiveChunkStore.java

@@ -139,7 +139,7 @@ public class PrimitiveChunkStore implements ChunkStore {
                     try {
                         store[x][z][y] = temp[x][y][z];
                     }
-                    catch (Exception e) {}
+                    catch (Exception e) { e.printStackTrace(); }
                 }
             }
         }