diff --git a/src/main/java/bentobox/addon/level/LevelPresenter.java b/src/main/java/bentobox/addon/level/LevelPresenter.java
index a55bbb2..9c01f5c 100644
--- a/src/main/java/bentobox/addon/level/LevelPresenter.java
+++ b/src/main/java/bentobox/addon/level/LevelPresenter.java
@@ -76,11 +76,8 @@ public class LevelPresenter {
 
     private boolean onLevelWaitTime(final User sender) {
         if (levelWaitTime.containsKey(sender.getUniqueId())) {
-            if (levelWaitTime.get(sender.getUniqueId()).longValue() > Calendar.getInstance().getTimeInMillis()) {
-                return true;
-            }
+            return levelWaitTime.get(sender.getUniqueId()).longValue() > Calendar.getInstance().getTimeInMillis();
 
-            return false;
         }
 
         return false;
diff --git a/src/main/java/bentobox/addon/level/TopTen.java b/src/main/java/bentobox/addon/level/TopTen.java
index 80025f6..042e426 100644
--- a/src/main/java/bentobox/addon/level/TopTen.java
+++ b/src/main/java/bentobox/addon/level/TopTen.java
@@ -33,7 +33,6 @@ public class TopTen implements Listener {
     // Top ten list of players
     private Map<World,TopTenData> topTenList;
     private final int[] SLOTS = new int[] {4, 12, 14, 19, 20, 21, 22, 23, 24, 25};
-    private final boolean DEBUG = false;
     private Database<TopTenData> handler;
 
     public TopTen(Level addon) {
@@ -104,6 +103,7 @@ public class TopTen implements Listener {
         // Check world
         topTenList.putIfAbsent(world, new TopTenData());
         topTenList.get(world).setUniqueId(world.getName());
+        boolean DEBUG = false;
         if (DEBUG)
             addon.getLogger().info("DEBUG: GUI display");
 
diff --git a/src/main/java/bentobox/addon/level/calculators/CalcIslandLevel.java b/src/main/java/bentobox/addon/level/calculators/CalcIslandLevel.java
index 21aa74b..4ef9675 100644
--- a/src/main/java/bentobox/addon/level/calculators/CalcIslandLevel.java
+++ b/src/main/java/bentobox/addon/level/calculators/CalcIslandLevel.java
@@ -31,19 +31,19 @@ public class CalcIslandLevel {
 
     private static final int MAX_CHUNKS = 200;
     private static final long SPEED = 1;
-    private boolean checking = true;
-    private BukkitTask task;
+    private boolean checking;
+    private final BukkitTask task;
 
-    private Level addon;
+    private final Level addon;
 
-    private Set<Pair<Integer, Integer>> chunksToScan;
-    private Island island;
-    private World world;
-    private Results result;
-    private Runnable onExit;
+    private final Set<Pair<Integer, Integer>> chunksToScan;
+    private final Island island;
+    private final World world;
+    private final Results result;
+    private final Runnable onExit;
 
-    // Copy the limits hashmap
-    HashMap<Material, Integer> limitCount;
+    // Copy the limits hash map
+    private final HashMap<Material, Integer> limitCount;
 
 
     /**
@@ -56,7 +56,7 @@ public class CalcIslandLevel {
     public CalcIslandLevel(final Level addon, final Island island, final Runnable onExit) {
         this.addon = addon;
         this.island = island;
-        this.world = island != null ? island.getCenter().getWorld() : null;
+        this.world = island.getCenter().getWorld();
         this.limitCount = new HashMap<>(addon.getSettings().getBlockLimits());
         this.onExit = onExit;
 
@@ -112,19 +112,19 @@ public class CalcIslandLevel {
 
     private void scanChunk(ChunkSnapshot chunk) {
         for (int x = 0; x< 16; x++) {
-            // Check if the block coord is inside the protection zone and if not, don't count it
+            // Check if the block coordinate is inside the protection zone and if not, don't count it
             if (chunk.getX() * 16 + x < island.getMinProtectedX() || chunk.getX() * 16 + x >= island.getMinProtectedX() + island.getProtectionRange() * 2) {
                 continue;
             }
             for (int z = 0; z < 16; z++) {
-                // Check if the block coord is inside the protection zone and if not, don't count it
+                // Check if the block coordinate is inside the protection zone and if not, don't count it
                 if (chunk.getZ() * 16 + z < island.getMinProtectedZ() || chunk.getZ() * 16 + z >= island.getMinProtectedZ() + island.getProtectionRange() * 2) {
                     continue;
                 }
 
                 for (int y = 0; y < island.getCenter().getWorld().getMaxHeight(); y++) {
                     Material blockData = chunk.getBlockType(x, y, z);
-                    boolean belowSeaLevel = (addon.getSettings().getSeaHeight() > 0 && y<=addon.getSettings().getSeaHeight()) ? true : false;
+                    boolean belowSeaLevel = addon.getSettings().getSeaHeight() > 0 && y <= addon.getSettings().getSeaHeight();
                     // Air is free
                     if (!blockData.equals(Material.AIR)) {
                         checkBlock(blockData, belowSeaLevel);
@@ -147,7 +147,7 @@ public class CalcIslandLevel {
 
     /**
      * Checks if a block has been limited or not and whether a block has any value or not
-     * @param md
+     * @param md Material
      * @return value of the block if can be counted
      */
     private int limitCount(Material md) {
@@ -171,7 +171,7 @@ public class CalcIslandLevel {
     /**
      * Get value of a material
      * World blocks trump regular block values
-     * @param md
+     * @param md Material
      * @return value of a material
      */
     private int getValue(Material md) {
@@ -183,8 +183,8 @@ public class CalcIslandLevel {
 
     /**
      * Get a set of all the chunks in island
-     * @param island
-     * @return
+     * @param island - island
+     * @return - set of all the chunks in the island to scan
      */
     private Set<Pair<Integer, Integer>> getChunksToScan(Island island) {
         Set<Pair<Integer, Integer>> chunkSnapshot = new HashSet<>();
@@ -238,7 +238,6 @@ public class CalcIslandLevel {
         reportLines.addAll(sortedReport(total, result.mdCount));
 
         reportLines.add("Blocks not counted because they exceeded limits: " + String.format("%,d",result.ofCount.size()));
-        //entriesSortedByCount = Multisets.copyHighestCountFirst(ofCount).entrySet();
         Iterable<Multiset.Entry<Material>> entriesSortedByCount = result.ofCount.entrySet();
         Iterator<Entry<Material>> it = entriesSortedByCount.iterator();
         while (it.hasNext()) {
@@ -255,7 +254,6 @@ public class CalcIslandLevel {
         reportLines.add("==================================");
         reportLines.add("Blocks on island that are not in config.yml");
         reportLines.add("Total number = " + String.format("%,d",result.ncCount.size()));
-        //entriesSortedByCount = Multisets.copyHighestCountFirst(ncCount).entrySet();
         entriesSortedByCount = result.ncCount.entrySet();
         it = entriesSortedByCount.iterator();
         while (it.hasNext()) {
@@ -270,9 +268,7 @@ public class CalcIslandLevel {
     private Collection<String> sortedReport(int total, Multiset<Material> MaterialCount) {
         Collection<String> result = new ArrayList<>();
         Iterable<Multiset.Entry<Material>> entriesSortedByCount = Multisets.copyHighestCountFirst(MaterialCount).entrySet();
-        Iterator<Entry<Material>> it = entriesSortedByCount.iterator();
-        while (it.hasNext()) {
-            Entry<Material> en = it.next();
+        for (Entry<Material> en : entriesSortedByCount) {
             Material type = en.getElement();
 
             int value = 0;
@@ -281,7 +277,7 @@ public class CalcIslandLevel {
                 value = addon.getSettings().getBlockValues().get(type);
             }
             result.add(type.toString() + ":"
-                    + String.format("%,d",en.getCount()) + " blocks x " + value + " = " + (value * en.getCount()));
+                    + String.format("%,d", en.getCount()) + " blocks x " + value + " = " + (value * en.getCount()));
             total += (value * en.getCount());
         }
         result.add("Subtotal = " + total);
@@ -302,10 +298,10 @@ public class CalcIslandLevel {
      */
     public class Results {
         private List<String> report;
-        private Multiset<Material> mdCount = HashMultiset.create();
-        private Multiset<Material> uwCount = HashMultiset.create();
-        private Multiset<Material> ncCount = HashMultiset.create();
-        private Multiset<Material> ofCount = HashMultiset.create();
+        private final Multiset<Material> mdCount = HashMultiset.create();
+        private final Multiset<Material> uwCount = HashMultiset.create();
+        private final Multiset<Material> ncCount = HashMultiset.create();
+        private final Multiset<Material> ofCount = HashMultiset.create();
         private long rawBlockCount = 0;
         private long underWaterBlockCount = 0;
         private long level = 0;
@@ -317,12 +313,7 @@ public class CalcIslandLevel {
         public int getDeathHandicap() {
             return deathHandicap;
         }
-        /**
-         * @param deathHandicap the deathHandicap to set
-         */
-        public void setDeathHandicap(int deathHandicap) {
-            this.deathHandicap = deathHandicap;
-        }
+
         /**
          * @return the report
          */
@@ -341,24 +332,6 @@ public class CalcIslandLevel {
         public long getPointsToNextLevel() {
             return pointsToNextLevel;
         }
-        /**
-         * @param report the report to set
-         */
-        public void setReport(List<String> report) {
-            this.report = report;
-        }
-        /**
-         * @param level the level to set
-         */
-        public void setLevel(long level) {
-            this.level = level;
-        }
-        /**
-         * @param pointsToNextLevel the pointsToNextLevel to set
-         */
-        public void setPointsToNextLevel(long pointsToNextLevel) {
-            this.pointsToNextLevel = pointsToNextLevel;
-        }
 
     }
 }
diff --git a/src/main/java/bentobox/addon/level/commands/AdminTop.java b/src/main/java/bentobox/addon/level/commands/AdminTop.java
index 72d6ce6..6644098 100644
--- a/src/main/java/bentobox/addon/level/commands/AdminTop.java
+++ b/src/main/java/bentobox/addon/level/commands/AdminTop.java
@@ -23,7 +23,7 @@ public class AdminTop extends CompositeCommand {
     @Override
     public boolean execute(User user, String label, List<String> args) {
         // Get world
-        World world = null;
+        World world;
         if (args.isEmpty()) {
             if (getPlugin().getIWM().getOverWorlds().size() == 1) {
                 world = getPlugin().getIWM().getOverWorlds().get(0);
diff --git a/src/test/java/bentobox/addon/level/LevelPresenterTest.java b/src/test/java/bentobox/addon/level/LevelPresenterTest.java
index 523de08..a1c5861 100644
--- a/src/test/java/bentobox/addon/level/LevelPresenterTest.java
+++ b/src/test/java/bentobox/addon/level/LevelPresenterTest.java
@@ -35,7 +35,6 @@ public class LevelPresenterTest {
 
     private BentoBox plugin;
     private Level addon;
-    private IslandsManager im;
     private PlayerLevel pl;
 
     /**
@@ -48,7 +47,7 @@ public class LevelPresenterTest {
         IslandWorldManager iwm = mock(IslandWorldManager.class);
         when(plugin.getIWM()).thenReturn(iwm);
         when(iwm.getPermissionPrefix(Mockito.any())).thenReturn("world");
-        im = mock(IslandsManager.class);
+        IslandsManager im = mock(IslandsManager.class);
         when(plugin.getIslands()).thenReturn(im);
         // Has island
         when(im.hasIsland(Mockito.any(), Mockito.any(User.class))).thenReturn(true);