Minor improvements in comparator tests

stratosphere-java/src/test/java/eu/stratosphere/api/java/typeutils/runtime/CopyableValueComparatorTest.java

@@ -34,12 +34,12 @@ public class CopyableValueComparatorTest extends ComparatorTestBase<StringValue>
 
 	@Override
 	protected TypeComparator<StringValue> createComparator(boolean ascending) {
-		return new CopyableValueComparator(ascending, StringValue.class);
+		return new CopyableValueComparator<StringValue>(ascending, StringValue.class);
 	}
 
 	@Override
 	protected TypeSerializer<StringValue> createSerializer() {
-		return new CopyableValueSerializer(StringValue.class);
+		return new CopyableValueSerializer<StringValue>(StringValue.class);
 	}
 
 	@Override

stratosphere-java/src/test/java/eu/stratosphere/api/java/typeutils/runtime/GenericTypeComparatorTest.java

@@ -113,6 +113,7 @@ public class GenericTypeComparatorTest {
 
 		private final Class<T> type;
 
+		@SuppressWarnings("unchecked")
 		public ComparatorTestInstance(T[] testData) {
 			if (testData == null || testData.length == 0) {
 				throw new IllegalArgumentException();
@@ -123,6 +124,7 @@ public class GenericTypeComparatorTest {
 		}
 
 		@Override
+		@SuppressWarnings({ "unchecked", "rawtypes" })
 		protected TypeComparator<T> createComparator(boolean ascending) {
 			return new GenericTypeComparator(ascending, GenericTypeComparatorTest.createSerializer(this.type), this.type);
 		}

stratosphere-java/src/test/java/eu/stratosphere/api/java/typeutils/runtime/ValueComparatorTest.java

@@ -17,12 +17,7 @@ package eu.stratosphere.api.java.typeutils.runtime;
 import eu.stratosphere.api.common.typeutils.ComparatorTestBase;
 import eu.stratosphere.api.common.typeutils.TypeComparator;
 import eu.stratosphere.api.common.typeutils.TypeSerializer;
-import eu.stratosphere.api.common.typeutils.base.StringValueSerializer;
 import eu.stratosphere.types.StringValue;
-import eu.stratosphere.types.Value;
-import java.io.DataInput;
-import java.io.DataOutput;
-import java.io.IOException;
 
 public class ValueComparatorTest extends ComparatorTestBase<StringValue> {
 
@@ -39,12 +34,12 @@ public class ValueComparatorTest extends ComparatorTestBase<StringValue> {
 
 	@Override
 	protected TypeComparator<StringValue> createComparator(boolean ascending) {
-		return new ValueComparator(ascending, StringValue.class);
+		return new ValueComparator<StringValue>(ascending, StringValue.class);
 	}
 
 	@Override
 	protected TypeSerializer<StringValue> createSerializer() {
-		return new ValueSerializer(StringValue.class);
+		return new ValueSerializer<StringValue>(StringValue.class);
 	}
 
 	@Override