I just did a fresh install, using the 07-Apr-2016 amd64 Desktop ISO, and have an encrypted swap.

$ sudo blkid /dev/sda
/dev/sda: PTUUID="ecd421a6-9bf6-40d5-a94e-c87ac47a479d" PTTYPE="gpt"
$ sudo blkid
/dev/sda1: UUID="50D0-7B1F" TYPE="vfat" PARTUUID="b2e2fef6-36c8-4d66-a57f-231672b9d5bb"
/dev/sda2: UUID="4d9e731b-bc43-45fc-b78e-a62a6fd51e37" TYPE="ext2" PARTUUID="c8e4875d-aa7e-4ae1-9417-97f821303627"
/dev/sda3: UUID="4hQqQp-MKTj-hPkE-DGIZ-2cgy-qkwB-PEoM6H" TYPE="LVM2_member" PARTUUID="624e3ff6-303f-4499-a5df-38459dd1f406"
/dev/sdb1: LABEL="OSDisk" UUID="CA30085930084EBF" TYPE="ntfs" PARTUUID="82da00cb-01"
/dev/sdb2: LABEL="Recovery" UUID="B8300A3C300A025C" TYPE="ntfs" PARTUUID="82da00cb-02"
/dev/mapper/ubuntu--vg-root: UUID="91ad536a-7427-4271-bb61-a9c8bb485316" TYPE="ext4"
/dev/mapper/ubuntu--vg-swap_1: UUID="8a06175f-5e69-48ed-948a-393fd127b955" TYPE="swap"
/dev/mapper/cryptswap1: UUID="0b1804c2-fb76-430b-93d1-63a6729fea6d" TYPE="swap"
$ swapon -s
Filename				Type		Size	Used	Priority
/dev/dm-2                              	partition	16698876	0	-1
$ ls -al /dev/mapper/cryptswap1
lrwxrwxrwx 1 root root 7 Apr  7 12:50 /dev/mapper/cryptswap1 -> ../dm-2
$ printf "x\np\n" | sudo fdisk /dev/sda

Welcome to fdisk (util-linux 2.27.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): 
Expert command (m for help): Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: ECD421A6-9BF6-40D5-A94E-C87AC47A479D
First LBA: 34
Last LBA: 976773134
Alternative LBA: 976773167
Partition entries LBA: 2
Allocated partition entries: 128

Device       Start       End   Sectors Type-UUID                            UUID                                 Name Attrs
/dev/sda1     2048   1050623   1048576 C12A7328-F81F-11D2-BA4B-00A0C93EC93B B2E2FEF6-36C8-4D66-A57F-231672B9D5BB      
/dev/sda2  1050624   2050047    999424 0FC63DAF-8483-4772-8E79-3D69D8477DE4 C8E4875D-AA7E-4AE1-9417-97F821303627      
/dev/sda3  2050048 976771071 974721024 E6D6D379-F507-44C2-A23C-238F2A3DF928 624E3FF6-303F-4499-A5DF-38459DD1F406      

Expert command (m for help):
$ ls -l /run/systemd/generator/
total 20
-rw-r--r-- 1 root root 374 Apr  7 15:11 boot-efi.mount
-rw-r--r-- 1 root root 450 Apr  7 15:11 boot.mount
drwxr-xr-x 2 root root  60 Apr  7 15:11 cryptsetup.target.requires
drwxr-xr-x 2 root root  60 Apr  7 15:11 dev-disk-by\x2duuid-8a06175f\x2d5e69\x2d48ed\x2d948a\x2d393fd127b955.device.wants
drwxr-xr-x 2 root root  60 Apr  7 15:11 dev-mapper-cryptswap1.device.d
drwxr-xr-x 2 root root  60 Apr  7 15:11 dev-mapper-cryptswap1.device.requires
-rw-r--r-- 1 root root 188 Apr  7 15:11 dev-mapper-cryptswap1.swap
drwxr-xr-x 2 root root  60 Apr  7 15:11 hwclock.service.d
drwxr-xr-x 2 root root 100 Apr  7 15:11 local-fs.target.requires
drwxr-xr-x 2 root root  60 Apr  7 15:11 local-fs.target.wants
-rw-r--r-- 1 root root 250 Apr  7 15:11 -.mount
drwxr-xr-x 2 root root  60 Apr  7 15:11 multi-user.target.wants
drwxr-xr-x 2 root root  60 Apr  7 15:11 networking.service.d
drwxr-xr-x 2 root root  60 Apr  7 15:11 remote-fs.target.d
drwxr-xr-x 2 root root  60 Apr  7 15:11 sendsigs.service.d
drwxr-xr-x 2 root root  60 Apr  7 15:11 swap.target.requires
-rw-r--r-- 1 root root 947 Apr  7 15:11 <email address hidden>
drwxr-xr-x 2 root root  60 Apr  7 15:11 umountfs.service.d
drwxr-xr-x 2 root root  60 Apr  7 15:11 umountnfs.service.d