diff --git a/hibernate-core/src/main/java/org/hibernate/internal/util/compare/ComparableComparator.java b/hibernate-core/src/main/java/org/hibernate/internal/util/compare/ComparableComparator.java
index 6d8a3486e7..5a831ea6cc 100644
--- a/hibernate-core/src/main/java/org/hibernate/internal/util/compare/ComparableComparator.java
+++ b/hibernate-core/src/main/java/org/hibernate/internal/util/compare/ComparableComparator.java
@@ -15,7 +15,9 @@ import java.util.Comparator;
  * @author Gavin King
  * @author Steve Ebersole
  */
+@SuppressWarnings("rawtypes")
 public class ComparableComparator<T extends Comparable> implements Comparator<T>, Serializable {
+
 	public static final Comparator INSTANCE = new ComparableComparator();
 
 	@SuppressWarnings("unchecked")
diff --git a/hibernate-core/src/main/java/org/hibernate/internal/util/compare/RowVersionComparator.java b/hibernate-core/src/main/java/org/hibernate/internal/util/compare/RowVersionComparator.java
index 1803f86d88..e313f8c88f 100644
--- a/hibernate-core/src/main/java/org/hibernate/internal/util/compare/RowVersionComparator.java
+++ b/hibernate-core/src/main/java/org/hibernate/internal/util/compare/RowVersionComparator.java
@@ -19,13 +19,12 @@ public final class RowVersionComparator implements Comparator<byte[]> {
 	}
 
 	@Override
-	@SuppressWarnings("unchecked")
 	public int compare(byte[] o1, byte[] o2) {
 		final int lengthToCheck = Math.min( o1.length, o2.length );
 
 		for ( int i = 0 ; i < lengthToCheck ; i++ ) {
 			// must do an unsigned int comparison
-			final int comparison = ComparableComparator.INSTANCE.compare(
+			final int comparison = ComparableComparator.<Integer>instance().compare(
 						Byte.toUnsignedInt( o1[i] ),
 						Byte.toUnsignedInt( o2[i] )
 			);
diff --git a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/AbstractEmbeddableMapping.java b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/AbstractEmbeddableMapping.java
index 7fd9d2d0d3..e33d204593 100644
--- a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/AbstractEmbeddableMapping.java
+++ b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/AbstractEmbeddableMapping.java
@@ -836,7 +836,7 @@ public abstract class AbstractEmbeddableMapping implements EmbeddableMappingType
 			};
 		}
 		else {
-			return ImmutableMutabilityPlan.INSTANCE;
+			return ImmutableMutabilityPlan.instance();
 		}
 	}
 }
diff --git a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/EmbeddableMappingTypeImpl.java b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/EmbeddableMappingTypeImpl.java
index 21d7e9999f..676866827b 100644
--- a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/EmbeddableMappingTypeImpl.java
+++ b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/EmbeddableMappingTypeImpl.java
@@ -695,7 +695,7 @@ public class EmbeddableMappingTypeImpl extends AbstractEmbeddableMapping impleme
 			};
 		}
 		else {
-			return ImmutableMutabilityPlan.INSTANCE;
+			return ImmutableMutabilityPlan.instance();
 		}
 	}
 
diff --git a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/GeneratedValuesProcessor.java b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/GeneratedValuesProcessor.java
index a4a67035dd..f7e0b4e07e 100644
--- a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/GeneratedValuesProcessor.java
+++ b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/GeneratedValuesProcessor.java
@@ -176,7 +176,7 @@ public class GeneratedValuesProcessor {
 				jdbcSelect,
 				jdbcParamBindings,
 				new NoCallbackExecutionContext( session ),
-				RowTransformerArrayImpl.INSTANCE,
+				RowTransformerArrayImpl.instance(),
 				null,
 				FILTER,
 				1
diff --git a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/MappingModelCreationHelper.java b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/MappingModelCreationHelper.java
index c1f3ab4c6e..5fbbc33013 100644
--- a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/MappingModelCreationHelper.java
+++ b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/MappingModelCreationHelper.java
@@ -438,13 +438,13 @@ public class MappingModelCreationHelper {
 			};
 		}
 		else {
-			return ImmutableMutabilityPlan.INSTANCE;
+			return ImmutableMutabilityPlan.instance();
 		}
 	}
 
 	@SuppressWarnings("rawtypes")
 	public static AttributeMetadata getAttributeMetadata(PropertyAccess propertyAccess) {
-		return new SimpleAttributeMetadata( propertyAccess, ImmutableMutabilityPlan.INSTANCE, false, true, false, false, true, null);// todo (6.0) : not sure if CascadeStyle=null is correct
+		return new SimpleAttributeMetadata( propertyAccess, ImmutableMutabilityPlan.instance(), false, true, false, false, true, null);// todo (6.0) : not sure if CascadeStyle=null is correct
 	}
 
 	@SuppressWarnings("rawtypes")
diff --git a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/SingleAttributeIdentifierMapping.java b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/SingleAttributeIdentifierMapping.java
index f6fad89adc..9adf681b87 100644
--- a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/SingleAttributeIdentifierMapping.java
+++ b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/SingleAttributeIdentifierMapping.java
@@ -85,6 +85,6 @@ public interface SingleAttributeIdentifierMapping extends EntityIdentifierMappin
 
 	@Override
 	default MutabilityPlan getMutabilityPlan() {
-		return ImmutableMutabilityPlan.INSTANCE;
+		return ImmutableMutabilityPlan.instance();
 	}
 }
diff --git a/hibernate-core/src/main/java/org/hibernate/query/sqm/mutation/internal/MatchingIdSelectionHelper.java b/hibernate-core/src/main/java/org/hibernate/query/sqm/mutation/internal/MatchingIdSelectionHelper.java
index 8329330e9c..572d1b9ebd 100644
--- a/hibernate-core/src/main/java/org/hibernate/query/sqm/mutation/internal/MatchingIdSelectionHelper.java
+++ b/hibernate-core/src/main/java/org/hibernate/query/sqm/mutation/internal/MatchingIdSelectionHelper.java
@@ -316,7 +316,7 @@ public class MatchingIdSelectionHelper {
 			rowTransformer = RowTransformerSingularReturnImpl.instance();
 		}
 		else {
-			rowTransformer = RowTransformerArrayImpl.INSTANCE;
+			rowTransformer = RowTransformerArrayImpl.instance();
 		}
 		//noinspection unchecked
 		return jdbcServices.getJdbcSelectExecutor().list(
diff --git a/hibernate-core/src/main/java/org/hibernate/result/internal/OutputsImpl.java b/hibernate-core/src/main/java/org/hibernate/result/internal/OutputsImpl.java
index 9728d5a4e3..51285b571d 100644
--- a/hibernate-core/src/main/java/org/hibernate/result/internal/OutputsImpl.java
+++ b/hibernate-core/src/main/java/org/hibernate/result/internal/OutputsImpl.java
@@ -188,7 +188,7 @@ public class OutputsImpl implements Outputs {
 			//noinspection unchecked
 			final RowReader<Object> rowReader = (RowReader<Object>) ResultsHelper.createRowReader(
 					getSessionFactory(),
-					RowTransformerStandardImpl.INSTANCE,
+					RowTransformerStandardImpl.instance(),
 					null,
 					jdbcValues
 			);
diff --git a/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerArrayImpl.java b/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerArrayImpl.java
index fcc5120476..d646707a90 100644
--- a/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerArrayImpl.java
+++ b/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerArrayImpl.java
@@ -17,7 +17,7 @@ public class RowTransformerArrayImpl implements RowTransformer<Object[]> {
 	/**
 	 * Singleton access
 	 */
-	public static final RowTransformerArrayImpl INSTANCE = new RowTransformerArrayImpl();
+	private static final RowTransformerArrayImpl INSTANCE = new RowTransformerArrayImpl();
 
 	public static RowTransformerArrayImpl instance() {
 		return INSTANCE;
diff --git a/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerListImpl.java b/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerListImpl.java
index 98b09664a8..47fe3decbd 100644
--- a/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerListImpl.java
+++ b/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerListImpl.java
@@ -19,9 +19,11 @@ public class RowTransformerListImpl<T> implements RowTransformer<List<Object>> {
 	/**
 	 * Singleton access
 	 */
-	public static final RowTransformerListImpl INSTANCE = new RowTransformerListImpl();
+	@SuppressWarnings( "rawtypes" )
+	private static final RowTransformerListImpl INSTANCE = new RowTransformerListImpl();
 
-	public static RowTransformerListImpl instance() {
+	@SuppressWarnings( "unchecked" )
+	public static <X> RowTransformerListImpl<X> instance() {
 		return INSTANCE;
 	}
 
diff --git a/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerSingularReturnImpl.java b/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerSingularReturnImpl.java
index 434243ee22..aab993aad8 100644
--- a/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerSingularReturnImpl.java
+++ b/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerSingularReturnImpl.java
@@ -22,7 +22,7 @@ public class RowTransformerSingularReturnImpl<R> implements RowTransformer<R> {
 	 * Singleton access
 	 */
 	@SuppressWarnings("rawtypes")
-	public static final RowTransformerSingularReturnImpl INSTANCE = new RowTransformerSingularReturnImpl();
+	private static final RowTransformerSingularReturnImpl INSTANCE = new RowTransformerSingularReturnImpl();
 
 	@SuppressWarnings("unchecked")
 	public static <R> RowTransformer<R> instance() {
diff --git a/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerStandardImpl.java b/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerStandardImpl.java
index 528bbe5864..1c23add162 100644
--- a/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerStandardImpl.java
+++ b/hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerStandardImpl.java
@@ -22,7 +22,7 @@ public class RowTransformerStandardImpl<T> implements RowTransformer<T> {
 	 * Singleton access
 	 */
 	@SuppressWarnings("rawtypes")
-	public static final RowTransformerStandardImpl INSTANCE = new RowTransformerStandardImpl();
+	private static final RowTransformerStandardImpl INSTANCE = new RowTransformerStandardImpl();
 
 	@SuppressWarnings("unchecked")
 	public static <T> RowTransformer<T> instance() {
diff --git a/hibernate-core/src/main/java/org/hibernate/sql/results/internal/StandardRowReader.java b/hibernate-core/src/main/java/org/hibernate/sql/results/internal/StandardRowReader.java
index 77839c03d8..e94898dc2c 100644
--- a/hibernate-core/src/main/java/org/hibernate/sql/results/internal/StandardRowReader.java
+++ b/hibernate-core/src/main/java/org/hibernate/sql/results/internal/StandardRowReader.java
@@ -73,9 +73,9 @@ public class StandardRowReader<T> implements RowReader<T> {
 		this.sortedForResolveInstance = (Initializer<InitializerData>[]) sortedForResolveInitializers;
 		this.sortedForResolveInstanceData = new InitializerData[sortedForResolveInstance.length];
 		this.hasCollectionInitializers = hasCollectionInitializers;
-		this.rowTransformer = rowTransformer == RowTransformerArrayImpl.INSTANCE && resultAssemblers.length != 1
-				|| rowTransformer == RowTransformerStandardImpl.INSTANCE
-				|| rowTransformer == RowTransformerSingularReturnImpl.INSTANCE && resultAssemblers.length == 1
+		this.rowTransformer = rowTransformer == RowTransformerArrayImpl.instance() && resultAssemblers.length != 1
+				|| rowTransformer == RowTransformerStandardImpl.instance()
+				|| rowTransformer == RowTransformerSingularReturnImpl.instance() && resultAssemblers.length == 1
 				? null
 				: rowTransformer;
 		this.domainResultJavaType = domainResultJavaType;
diff --git a/hibernate-core/src/main/java/org/hibernate/sql/results/spi/ScrollableResultsConsumer.java b/hibernate-core/src/main/java/org/hibernate/sql/results/spi/ScrollableResultsConsumer.java
index 7100efeb4d..442a0d9c16 100644
--- a/hibernate-core/src/main/java/org/hibernate/sql/results/spi/ScrollableResultsConsumer.java
+++ b/hibernate-core/src/main/java/org/hibernate/sql/results/spi/ScrollableResultsConsumer.java
@@ -26,7 +26,11 @@ import org.hibernate.sql.results.internal.RowProcessingStateStandardImpl;
 public class ScrollableResultsConsumer<R> implements ResultsConsumer<ScrollableResultsImplementor<R>, R> {
 	/**
 	 * Singleton access to the standard scrollable-results consumer instance
+	 *
+	 * @deprecated in favor of {@link #instance()}
 	 */
+	@SuppressWarnings( "rawtypes" )
+	@Deprecated( forRemoval = true )
 	public static final ScrollableResultsConsumer INSTANCE = new ScrollableResultsConsumer();
 
 	@SuppressWarnings("unchecked")
diff --git a/hibernate-core/src/main/java/org/hibernate/sql/results/spi/SingleResultConsumer.java b/hibernate-core/src/main/java/org/hibernate/sql/results/spi/SingleResultConsumer.java
index b0f4dfd1bd..0003a9b329 100644
--- a/hibernate-core/src/main/java/org/hibernate/sql/results/spi/SingleResultConsumer.java
+++ b/hibernate-core/src/main/java/org/hibernate/sql/results/spi/SingleResultConsumer.java
@@ -27,8 +27,8 @@ public class SingleResultConsumer<T> implements ResultsConsumer<T, T> {
 
 	private static final SingleResultConsumer<?> INSTANCE = new SingleResultConsumer<>();
 
+	@SuppressWarnings( "unchecked" )
 	public static <T> SingleResultConsumer<T> instance() {
-		//noinspection unchecked
 		return (SingleResultConsumer<T>) INSTANCE;
 	}
 
diff --git a/hibernate-core/src/main/java/org/hibernate/type/descriptor/java/AbstractClassJavaType.java b/hibernate-core/src/main/java/org/hibernate/type/descriptor/java/AbstractClassJavaType.java
index 219070caf4..d44cb4cb9c 100644
--- a/hibernate-core/src/main/java/org/hibernate/type/descriptor/java/AbstractClassJavaType.java
+++ b/hibernate-core/src/main/java/org/hibernate/type/descriptor/java/AbstractClassJavaType.java
@@ -46,13 +46,12 @@ public abstract class AbstractClassJavaType<T> implements BasicJavaType<T>, Seri
 	 * @param type The Java type.
 	 * @param mutabilityPlan The plan for handling mutability aspects of the java type.
 	 */
-	@SuppressWarnings("unchecked")
 	protected AbstractClassJavaType(Class<? extends T> type, MutabilityPlan<? extends T> mutabilityPlan) {
 		this(
 				type,
 				mutabilityPlan,
 				Comparable.class.isAssignableFrom( type )
-						? (Comparator<T>) ComparableComparator.INSTANCE
+						? ComparableComparator.instance()
 						: null
 		);
 	}
diff --git a/hibernate-core/src/main/java/org/hibernate/type/descriptor/java/Immutability.java b/hibernate-core/src/main/java/org/hibernate/type/descriptor/java/Immutability.java
index 45f3a1f4d4..3bba6c66d9 100644
--- a/hibernate-core/src/main/java/org/hibernate/type/descriptor/java/Immutability.java
+++ b/hibernate-core/src/main/java/org/hibernate/type/descriptor/java/Immutability.java
@@ -22,7 +22,10 @@ import org.hibernate.annotations.Mutability;
 public class Immutability implements MutabilityPlan<Object> {
 	/**
 	 * Singleton access
+	 *
+	 * @deprecated in favor of {@link #instance()}
 	 */
+	@Deprecated( forRemoval = true )
 	public static final Immutability INSTANCE = new Immutability();
 
 	public static <X> MutabilityPlan<X> instance() {
diff --git a/hibernate-core/src/main/java/org/hibernate/type/descriptor/java/ImmutableMutabilityPlan.java b/hibernate-core/src/main/java/org/hibernate/type/descriptor/java/ImmutableMutabilityPlan.java
index b475340471..bbec2228ea 100644
--- a/hibernate-core/src/main/java/org/hibernate/type/descriptor/java/ImmutableMutabilityPlan.java
+++ b/hibernate-core/src/main/java/org/hibernate/type/descriptor/java/ImmutableMutabilityPlan.java
@@ -21,6 +21,14 @@ import org.hibernate.SharedSessionContract;
  * @author Steve Ebersole
  */
 public class ImmutableMutabilityPlan<T> implements MutabilityPlan<T> {
+
+	/**
+	 * Singleton access
+	 *
+	 * @deprecated in favor of {@link #instance()}
+	 */
+	@SuppressWarnings( "rawtypes" )
+	@Deprecated( forRemoval = true )
 	public static final ImmutableMutabilityPlan INSTANCE = new ImmutableMutabilityPlan();
 
 	public static <X> ImmutableMutabilityPlan<X> instance() {