Add Override annotations where appropriate

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/metadata/LazyMetadataValue.java

@@ -64,6 +64,7 @@ public class LazyMetadataValue extends MetadataValueAdapter {
         super(owningPlugin);
     }
 
+    @Override
     @Nullable
     public Object value() {
         eval();
@@ -94,6 +95,7 @@ public class LazyMetadataValue extends MetadataValueAdapter {
         }
     }
 
+    @Override
     public synchronized void invalidate() {
         if (cacheStrategy != CacheStrategy.CACHE_ETERNALLY) {
             internalValue.clear();

paper-api/src/main/java/org/bukkit/metadata/MetadataValueAdapter.java

@@ -22,35 +22,43 @@ public abstract class MetadataValueAdapter implements MetadataValue {
         this.owningPlugin = new WeakReference<Plugin>(owningPlugin);
     }
 
+    @Override
     @Nullable
     public Plugin getOwningPlugin() {
         return owningPlugin.get();
     }
 
+    @Override
     public int asInt() {
         return NumberConversions.toInt(value());
     }
 
+    @Override
     public float asFloat() {
         return NumberConversions.toFloat(value());
     }
 
+    @Override
     public double asDouble() {
         return NumberConversions.toDouble(value());
     }
 
+    @Override
     public long asLong() {
         return NumberConversions.toLong(value());
     }
 
+    @Override
     public short asShort() {
         return NumberConversions.toShort(value());
     }
 
+    @Override
     public byte asByte() {
         return NumberConversions.toByte(value());
     }
 
+    @Override
     public boolean asBoolean() {
         Object value = value();
         if (value instanceof Boolean) {
@@ -68,6 +76,7 @@ public abstract class MetadataValueAdapter implements MetadataValue {
         return value != null;
     }
 
+    @Override
     @NotNull
     public String asString() {
         Object value = value();