Address some https://errorprone.info/bugpattern/EffectivelyPrivate findings.

jimfs/src/main/java/com/google/common/jimfs/AclAttributeProvider.java

@@ -119,7 +119,7 @@ private static final class View extends AbstractAttributeView implements AclFile
 
     private final FileOwnerAttributeView ownerView;
 
-    public View(FileLookup lookup, FileOwnerAttributeView ownerView) {
+    View(FileLookup lookup, FileOwnerAttributeView ownerView) {
       super(lookup);
       this.ownerView = checkNotNull(ownerView);
     }

jimfs/src/main/java/com/google/common/jimfs/BasicAttributeProvider.java

@@ -132,7 +132,7 @@ public BasicFileAttributes readAttributes(File file) {
   /** Implementation of {@link BasicFileAttributeView}. */
   private static final class View extends AbstractAttributeView implements BasicFileAttributeView {
 
-    protected View(FileLookup lookup) {
+    View(FileLookup lookup) {
       super(lookup);
     }
 

jimfs/src/main/java/com/google/common/jimfs/DosAttributeProvider.java

@@ -118,7 +118,7 @@ private static final class View extends AbstractAttributeView implements DosFile
 
     private final BasicFileAttributeView basicView;
 
-    public View(FileLookup lookup, BasicFileAttributeView basicView) {
+    View(FileLookup lookup, BasicFileAttributeView basicView) {
       super(lookup);
       this.basicView = checkNotNull(basicView);
     }

jimfs/src/main/java/com/google/common/jimfs/FileFactory.java

@@ -113,7 +113,7 @@ private final class SymbolicLinkSupplier implements Supplier<SymbolicLink> {
 
     private final JimfsPath target;
 
-    protected SymbolicLinkSupplier(JimfsPath target) {
+    SymbolicLinkSupplier(JimfsPath target) {
       this.target = checkNotNull(target);
     }
 

jimfs/src/main/java/com/google/common/jimfs/OwnerAttributeProvider.java

@@ -100,7 +100,7 @@ public FileOwnerAttributeView view(
   /** Implementation of {@link FileOwnerAttributeView}. */
   private static final class View extends AbstractAttributeView implements FileOwnerAttributeView {
 
-    public View(FileLookup lookup) {
+    View(FileLookup lookup) {
       super(lookup);
     }
 

jimfs/src/main/java/com/google/common/jimfs/PosixAttributeProvider.java

@@ -191,8 +191,7 @@ private static class View extends AbstractAttributeView implements PosixFileAttr
     private final BasicFileAttributeView basicView;
     private final FileOwnerAttributeView ownerView;
 
-    protected View(
-        FileLookup lookup, BasicFileAttributeView basicView, FileOwnerAttributeView ownerView) {
+    View(FileLookup lookup, BasicFileAttributeView basicView, FileOwnerAttributeView ownerView) {
       super(lookup);
       this.basicView = checkNotNull(basicView);
       this.ownerView = checkNotNull(ownerView);

jimfs/src/main/java/com/google/common/jimfs/UserDefinedAttributeProvider.java

@@ -113,7 +113,7 @@ public UserDefinedFileAttributeView view(
   /** Implementation of {@link UserDefinedFileAttributeView}. */
   private static class View extends AbstractAttributeView implements UserDefinedFileAttributeView {
 
-    public View(FileLookup lookup) {
+    View(FileLookup lookup) {
       super(lookup);
     }
 

jimfs/src/main/java/com/google/common/jimfs/UserLookupService.java

@@ -63,7 +63,7 @@ static GroupPrincipal createGroupPrincipal(String name) {
   /** Base class for {@link UserPrincipal} and {@link GroupPrincipal} implementations. */
   private abstract static class NamedPrincipal implements UserPrincipal {
 
-    protected final String name;
+    final String name;
 
     private NamedPrincipal(String name) {
       this.name = checkNotNull(name);

jimfs/src/test/java/com/google/common/jimfs/PathTypeTest.java

@@ -110,7 +110,7 @@ static void assertUriRoundTripsCorrectly(PathType type, String path) {
   /** Arbitrary path type with $ as the root, / as the separator and \ as an alternate separator. */
   private static final class FakePathType extends PathType {
 
-    protected FakePathType() {
+    FakePathType() {
       super(false, '/', '\\');
     }