Address small review comments

Author: NotStirred

chunky/src/java/se/llbit/chunky/world/JavaDimension.java

@@ -114,7 +114,7 @@ public boolean regionExistsWithinRange(RegionPosition pos, int minY, int maxY) {
   /**
    * @return File object pointing to the region file directory
    */
-  public synchronized File getRegionDirectory() {
+  public File getRegionDirectory() {
     return new File(getDimensionDirectory(), "region");
   }
 
@@ -127,7 +127,7 @@ public Date getLastModified() {
    *
    * @return File object pointing to the data directory
    */
-  protected synchronized File getDimensionDirectory() {
+  protected File getDimensionDirectory() {
     return dimensionDirectory;
   }
 

chunky/src/java/se/llbit/chunky/world/JavaWorld.java

@@ -70,7 +70,7 @@ public class JavaWorld extends World {
     new String[] { NETHER_DIMENSION_ID, OVERWORLD_DIMENSION_ID, END_DIMENSION_ID }
   ));
 
-  int versionId;
+  protected int versionId;
 
   /**
    * @param levelName name of the world (not the world directory).