Rename behavior classes

Who are we to say what is regarded as 'Default behavior

Java/src/main/java/com/gildedrose/behavior/ItemBehaviorPicker.java

@@ -2,12 +2,12 @@ package com.gildedrose.behavior;
 
 import com.gildedrose.behavior.item.ItemBehavior;
 import com.gildedrose.behavior.item.ItemBehaviorImpl;
-import com.gildedrose.behavior.quality.DefaultQualityBehavior;
+import com.gildedrose.behavior.quality.DecreasingQualityBehavior;
 import com.gildedrose.behavior.quality.ImmutableQualityBehavior;
 import com.gildedrose.behavior.quality.IncreasingQualityBehavior;
 import com.gildedrose.behavior.quality.QualityStage;
 import com.gildedrose.behavior.quality.StagedIncreasingQualityBehavior;
-import com.gildedrose.behavior.sellin.DefaultSellInBehavior;
+import com.gildedrose.behavior.sellin.DecreasingSellInBehavior;
 import com.gildedrose.behavior.sellin.ImmutableSellInBehavior;
 
 import java.util.ArrayList;
@@ -30,7 +30,7 @@ public class ItemBehaviorPicker {
     }
 
     private static ItemBehavior getAgedBrieItemBehavior() {
-        return ItemBehaviorImpl.of(IncreasingQualityBehavior.newInstance(), DefaultSellInBehavior.newInstance());
+        return ItemBehaviorImpl.of(IncreasingQualityBehavior.newInstance(), DecreasingSellInBehavior.newInstance());
     }
 
     private static ItemBehavior getSulfurusHandOfRagnarosItemBehavior() {
@@ -39,10 +39,10 @@ public class ItemBehaviorPicker {
 
     private static ItemBehavior getBackstagePassesItemBehavior() {
         List<QualityStage> stages = new ArrayList<>(Arrays.asList(QualityStage.of(10,2), QualityStage.of(5,3)));
-        return ItemBehaviorImpl.of(StagedIncreasingQualityBehavior.withStages(stages, 1), DefaultSellInBehavior.newInstance());
+        return ItemBehaviorImpl.of(StagedIncreasingQualityBehavior.withStages(stages, 1), DecreasingSellInBehavior.newInstance());
     }
 
     private static ItemBehavior getDefaultItemBehavior() {
-        return ItemBehaviorImpl.of(DefaultQualityBehavior.newInstance(), DefaultSellInBehavior.newInstance());
+        return ItemBehaviorImpl.of(DecreasingQualityBehavior.newInstance(), DecreasingSellInBehavior.newInstance());
     }
 }

Java/src/main/java/com/gildedrose/behavior/quality/DecreasingQualityBehavior.java

@@ -2,15 +2,15 @@ package com.gildedrose.behavior.quality;
 
 import com.gildedrose.Item;
 
-public class DefaultQualityBehavior implements QualityBehavior {
+public class DecreasingQualityBehavior implements QualityBehavior {
 
     public static final int MAX_QUALITY_LEVEL = 50;
     public static final int MIN_QUALITY_LEVEL = 0;
     public static final int DEFAULT_QUALITY_DECREASE = 1;
     public static final int FASTER_QUALITY_DECREASE = 2;
 
-    public static DefaultQualityBehavior newInstance() {
-        return new DefaultQualityBehavior();
+    public static DecreasingQualityBehavior newInstance() {
+        return new DecreasingQualityBehavior();
     }
 
     @Override

Java/src/main/java/com/gildedrose/behavior/sellin/DecreasingSellInBehavior.java

@@ -2,10 +2,10 @@ package com.gildedrose.behavior.sellin;
 
 import com.gildedrose.Item;
 
-public class DefaultSellInBehavior implements SellInBehavior {
+public class DecreasingSellInBehavior implements SellInBehavior {
 
-    public static DefaultSellInBehavior newInstance() {
-        return new DefaultSellInBehavior();
+    public static DecreasingSellInBehavior newInstance() {
+        return new DecreasingSellInBehavior();
     }
 
     @Override

Java/src/test/java/com/gildedrose/behavior/quality/DecreasingQualityBehaviorTest.java

@@ -6,13 +6,13 @@ import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-public class DefaultQualityBehaviorTest {
+public class DecreasingQualityBehaviorTest {
 
     private QualityBehavior qualityBehavior;
 
     @BeforeEach
     public void setUp() throws Exception {
-        qualityBehavior = new DefaultQualityBehavior();
+        qualityBehavior = new DecreasingQualityBehavior();
     }
 
     @Test

Java/src/test/java/com/gildedrose/behavior/sellin/DecreasingSellInBehaviorTest.java

@@ -6,13 +6,13 @@ import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-public class DefaultSellInBehaviorTest {
+public class DecreasingSellInBehaviorTest {
 
     private SellInBehavior sellInBehavior;
 
     @BeforeEach
     public void setUp() throws Exception {
-        sellInBehavior = new DefaultSellInBehavior();
+        sellInBehavior = new DecreasingSellInBehavior();
     }
 
     @Test